Inventor

Madhusudan Raghavan

Inventor

West Bloomfield, MI, US

Overview

2002–2021

Patent span

Mechanical engineering

Primary field (CPC F)

Patents· 275 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

F16Hprimary

F16HGearing57%

Y02TClimate change mitigation technologies related to transportation14%

B60KArrangement or mounting of propulsion units or of transmissions in vehicles12%

B60WConjoint control of vehicle sub-units of different type or different function4%

B60LPropulsion of electrically-propelled vehicles3%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests3%

F01LCyclically operating valves for machines or engines1%

Y10TTechnical subjects covered by former us classification1%

F02NStarting of combustion engines1%

H02JElectric power networks1%

PatentTitleYear

10,940,748Hybrid transmission with gear-based starter and method of starting2021 10,760,624Wedge-type selectable one-way clutches for engine disconnect devices of motor vehicle powertrains2020 10,676,079Hybrid electric powertrian system with e-accessory drive and associated power sharing architecture2020 10,189,470Hybrid vehicle propulsion systems and methods2019 9,586,575'Powertrain for a vehicle'2017 9,481,357'Hybrid powertrain with mechatronic actuator assembly and method of controlling the same'2016 9,475,481'Powertrain for a vehicle'2016 9,370,992'Powertrain for a vehicle'2016 9,169,763'System and method for solar-powered control of exhaust after-treatment systems'2015 8,854,000'Rapid energy recharge system for a battery electric vehicle'2014 8,540,600'Multi-speed planetary transmission with three brakes and four clutches'2013 8,538,617'Mode selection technique for onboard energy management'2013 8,460,150'Multi-speed planetary transmission with two compound planetary gear sets'2013 8,439,787'Transmission with mixed planetary layshaft structure'2013 8,439,791'Multi-speed planetary transmission with two compound planetary gear sets'2013 8,424,287'Electric preheating of a catalytic convertor using a solar cell array'2013 8,398,524'Multi-speed transmission with eight torque-transmitting mechanisms'2013 8,371,983'Hybrid transmission'2013 8,360,918'Multi-speed transmission with planetary and layshaft gears'2013 8,360,924'Multi-speed planetary transmission with two planetary gear sets and up to ten forward speed ratios'2013 8,360,919'Multi-speed transmission'2013 8,360,922'Multi-speed planetary transmission with up to ten forward speed ratios'2013 8,360,925'Multi-speed transmission with compound and simple planetary gear sets and with layshafts'2013 8,360,923'Multi-speed transmission with planetary gear sets and layshafts'2013 8,287,416'Eight-speed planetary layshaft transmission'2012 8,241,169'Eight speed automatic transmission'2012 8,241,168'Eight speed automatic transmission'2012 8,192,321'Eight speed automatic transmission'2012 8,170,737'Method of controlling vehicle powertrain and vehicle control system'2012 8,123,648'Eight speed automatic transmission'2012 8,092,336'Multi-speed transmission'2012 8,057,350'8-speed transmission'2011 8,052,565'Eight speed automatic transmission'2011 8,047,947'Eight speed automatic transmission'2011 8,038,567'Eight speed automatic transmission'2011 8,033,950'Multi-speed transmission having three planetary gear sets'2011 8,033,949'Multi-speed transmission'2011 8,036,785'Hybrid vehicle powertrain control method'2011 8,033,954'Hybrid powertrain with reversing engine and method of control'2011 8,021,262'8-speed transmission'2011 8,016,712'Eight speed automatic transmission'2011 8,007,393'Multi-speed transmission'2011 7,998,014'8-speed transmission'2011 7,976,424'Eight speed transmission'2011 7,967,715'Multi-speed transmission'2011 7,951,039'Eight speed automatic transmission'2011 7,946,950'8-speed transmissions'2011 7,946,949'Eight speed automatic transmission'2011 7,927,248'Eight speed automatic transmission'2011 7,887,457'Multi-speed transmission'2011 7,883,441'8-speed transmission'2011 7,871,352'Eight speed automatic transmission'2011 7,862,468'8-speed transmission'2011 7,854,679'8-speed transmission with three fixed interconnections'2010 7,828,689'8-speed transmission'2010 7,824,299'Multi-speed transmission'2010 7,824,298'8-speed transmission with two fixed interconnections'2010 7,815,541'Multi-speed transmission'2010 7,811,198'8-speed transmission'2010 7,811,197'8-speed transmission'2010 7,811,196'8-speed transmission with two fixed interconnections'2010 7,811,195'8-speed transmission'2010 7,798,934'8-speed transmission'2010 7,798,936'8-speed transmissions'2010 7,789,791'Eight speed automatic transmission'2010 7,785,225'Eight speed automatic transmission'2010 7,785,227'8-speed transmissions'2010 7,785,226'Multi-speed transmission'2010 7,766,782'8-speed transmission'2010 7,766,784'Eight speed automatic transmission'2010 7,766,783'8-speed transmission'2010 7,758,464'Multi-speed transmission'2010 7,753,819'Eight speed automatic transmission'2010 7,749,126'8-speed transmission'2010 7,749,129'8-speed transmission'2010 7,736,258'8-speed transmission'2010 7,736,259'8-Speed Transmission'2010 7,736,260'Multi-speed transmission'2010 7,731,622'8-speed transmissions'2010 7,731,621'8-speed transmission'2010 7,727,102'8-speed transmission'2010 7,717,817'Electrically variable transmissions having two planetary gear sets and clutched input'2010 7,704,180'Multi-speed transmission'2010 7,699,742'8-speed transmission with two fixed interconnections and on grounded member'2010 7,699,745'Multi-speed transmissions with a long pinion and one fixed interconnection'2010 7,699,741'Multi-speed transmission'2010 7,695,397'8-speed transmission'2010 7,686,731'Wide ratio transmission with four planetary gear sets and three fixed interconnections'2010 7,686,732'Wide ratio transmissions with multiple gear ratios'2010 7,678,009'8-speed transmission'2010 7,674,201'Wide ratio transmissions having multiple gear ratios'2010 7,674,202'Eight speed transmission'2010 7,670,242'Electrically variable transmission having three planetary gear sets with two fixed interconnections'2010 7,651,434'8-speed transmission'2010 7,648,437'Multi-mode electrically variable transmissions with interconnected gearsets'2010 7,611,432'Hybrid powertrain'2009 7,591,747'Electrically variable transmission having three planetary gear sets, two fixed interconnections and clutched input'2009 7,591,750'Electrically variable transmission having three interconnected planetary gear sets and clutched input'2009 7,575,532'Wide ratio transmission with four planetary gear sets'2009 7,563,191'Wide ratio transmission'2009 7,539,562'Hybrid vehicle powertrain control method and apparatus'2009 7,524,259'Wide ratio transmission with four planetary gear sets and four brakes'2009 7,513,846'8-speed transmission'2009 7,507,174'Electrically variable transmission having three planetary gear sets'2009 7,500,930'Electrically variable transmission with multiple interconnected gearsets'2009 7,497,797'Electrically variable transmission having at least three planetary gear sets and one fixed interconnection'2009 7,494,435'Electrically variable transmission having three planetary gear sets with two fixed interconnections'2009 7,473,201'Multi-mode electrically variable transmissions with three fixed interconnections and two input clutches'2009 7,473,199'Two-planetary electrically variable transmissions with multiple fixed ratios'2009 7,473,200'Multi-mode electrically variable transmissions with two brakes and three input clutches'2009 7,462,122'Multi-mode electrically variable transmissions with at least one brake and three clutches'2008 7,455,609'Electrically variable transmission having three planetary gear sets and clutched motor/generators'2008 7,452,296'Electrically variable transmission having three planetary gear sets, two fixed constraints and a stationary member'2008 7,452,302'Multi-speed transmissions with three interconnected gearsets'2008 7,442,145'Multi-Speed transmissions with a long pinion'2008 7,429,229'Multi-speed transmissions with a long pinion and four fixed interconnections'2008 7,422,535'Electrically variable transmissions having two planetary gearsets and clutched input'2008 7,404,386'Multi-step valve actuation system'2008 7,396,305'Electrically variable transmission having three planetary gear sets, a stationary member and three fixed interconnections'2008 7,393,297'Electrically variable transmissions with three interconnected gearsets'2008 7,393,298'Electrically variable transmission having three planetary gear sets with three interconnections'2008 7,387,585'Electrically variable transmission having three planetary gear sets, two fixed interconnections and a stationary member'2008 7,387,586'Three planetary electrically variable transmissions with mechanical reverse'2008 7,374,506'Electrically variable transmission having three planetary gear sets, a stationary member, three fixed interconnections and clutched input'2008 7,371,203'Electrically variable transmission having three planetary gear sets and two fixed interconnections and a stationary interconnection'2008 7,367,911'Electrically variable transmission having three planetary gear sets, clutched input, two fixed interconnections and a stationary member'2008 7,354,367'Electrically variable transmission having three planetary gear sets, four fixed interconnections and clutched input'2008 7,347,798'Electrically variable transmission having three planetary gearsets and four fixed interconnections'2008 7,329,201'Electrically variable transmission having two or three planetary gear sets with two or three fixed interconnections'2008 7,306,534'Electrically variable transmission having three planetary gear sets, four fixed interconnections and clutched input'2007 7,303,501'Multi-speed planetary transmissions having seven torque-transmitting devices and two fixed interconnections'2007 7,300,378'Multi-speed planetary transmissions having clutched input members and providing at least eight speed ratios'2007 7,300,374'Multi-mode electrically variable transmissions having two planetary gear sets with one fixed interconnection'2007 7,294,079'Electrically variable transmission having three planetary gear sets and two fixed interconnections and a stationary interconnection'2007 7,291,087'Planetary manual transmission'2007 7,288,041'Multi-mode electrically variable transmissions having two planetary gear sets with two fixed interconnections and clutched input'2007 7,282,004'Electrically variable transmission having three interconnected planetary gearsets, a stationary member and a fixed input'2007 7,273,435'Multi-mode electrically variable transmissions having two planetary gear sets with one fixed interconnection and clutched input'2007 7,261,658'Electrically variable transmission having two planetary gear sets with one stationary member and clutched input'2007 7,261,657'Electrically variable transmission having three interconnected planetary gear sets and fixed input'2007 7,261,666'Multi-speed planetary transmissions having seven torque transmitting devices engaged in combinations of five'2007 7,261,659'Electrically variable transmission having two planetary gearsets'2007 7,252,611'Electrically variable transmission having two planetary gear sets with one interconnecting member and clutched input'2007 7,252,612'Electrically variable transmission having two planetary gear sets with one fixed interconnection and a stationary member'2007 7,252,614'Electrically variable transmission having three planetary gear sets and clutched input'2007 7,252,613'Electrically variable transmission having two planetary gear sets with one stationary fixed interconnection'2007 7,250,019'Multi-speed planetary transmissions having a stationary member and seven torque-transmitting devices'2007 7,247,120'Multi-speed planetary transmissions having seven torque-transmitting devices engaged in combinations of two'2007 7,238,131'Electrically variable transmission having three planetary gear sets and three fixed interconnections'2007 7,232,393'Electrically variable transmission having two planetary gear sets with two fixed interconnections'2007 7,226,382'Multi-speed planetary transmissions having three interconnected gear members and multiple input clutches'2007 7,220,201'Electrically variable transmission having two planetary gear sets with two fixed interconnections and clutch input'2007 7,192,378'Planetary transmissions having three interconnecting members and clutched input members'2007 7,192,373'Electrically variable transmission having two planetary gear sets with one fixed interconnection'2007 7,179,186'Electrically variable transmission having three interconnected planetary gear sets'2007 7,179,187'Electrically variable transmission having three interconnected planetary gear sets, two clutches and two brakes'2007 7,179,185'Electrically variable transmission having three interconnected planetary gear sets, two clutches and at least two brakes'2007 7,175,561'Planetary transmissions having two non-continuously interconnected gear members'2007 7,169,074'Electrically variable transmission having two planetary gear sets with one stationary member'2007 7,166,053'Planetary transmissions having four interconnecting members and clutched input members'2007 7,162,983'Valve actuator assembly for variable displacement of an engine valve'2007 7,153,231'Planetary transmissions having two interconnecting members and clutched input members'2006 7,153,232'Planetary transmissions having a stationary member and an input member'2006 7,150,696'Planetary transmissions having a stationary gear member and clutched input members'2006 7,150,695'Planetary transmissions having input clutches and three interconnected gear sets'2006 7,128,684'Planetary transmissions having a stationary fixed interconnection and up to three input clutches'2006 7,118,510'Planetary transmissions having input clutches and two interconnecting members'2006 7,118,508'Planetary transmissions having three interconnected gear members and clutched input members'2006 7,108,627'Planetary transmissions having two interconnecting members and at least two input clutches'2006 7,104,914'Planetary transmissions having two fixed interconnections and a stationary gear member'2006 7,104,916'Planetary transmissions having a stationary fixed interconnection and providing at least eight speed ratios'2006 7,101,302'Planetary transmissions having a stationary member and input clutches'2006 7,094,173'Wide ratio transmissions having a stationary planetary member and at least four clutches'2006 7,090,610'Wide ratio transmissions with three interconnected planetary gear sets'2006 7,086,986'Wide ratio transmissions with two fixed interconnecting members and at least three clutches'2006 7,081,066'Planetary transmissions having three non-continuously interconnected gear sets'2006 7,074,152'Planetary transmissions having a stationary member and three interconnected gear members'2006 7,074,153'Planetary transmissions having three gear sets and input clutches'2006 7,066,861'Planetary transmissions having a stationary member and at least two input clutches'2006 7,056,258'Planetary transmissions having one interconnecting member and an input member'2006 7,056,257'Wide ratio transmissions with two fixed interconnecting members'2006 7,041,027'Wide ratio transmissions with a fixed interconnecting member and at least six clutches'2006 7,033,299'Planetary transmissions having three interconnected gear sets and clutched input'2006 7,007,649'Engine valve actuator assembly'2006 7,004,880'Wide ratio transmissions with three interconnected planetary gear sets and at least one brake'2006 7,001,304'Wide ratio transmissions having three planetary gear sets and at least six clutches'2006 6,997,846'Wide ratio transmissions with three planetary gear sets and two interconnecting members'2006 6,997,844'Wide ratio transmissions with three interconnected planetary gear sets and a stationary member'2006 6,994,649'Wide ratio transmissions having three gear sets and a stationary planetary member'2006 6,991,577'Wide ratio transmissions with three planetary gear sets and a stationary interconnecting member'2006 6,988,972'Wide ratio transmissions having three planetary gear sets and three brakes'2006 6,976,931'Eight speed transmissions with three planetary gear sets'2005 6,976,932'Multi-speed planetary transmission mechanisms with a stationary planetary member and two brakes'2005 6,962,548'Wide ratio transmissions with a stationary planetary gear member and at least five clutches'2005 6,949,048'Wide ratio transmissions with three planetary gear sets and two brakes'2005 6,945,900'Wide ratio transmissions with three interconnected planetary gear members'2005 6,932,735'Six-speed planetary transmission mechanisms with two clutches and three brakes'2005 6,846,263'Planetary transmissions with clutched input and a stationary member'2005 6,793,605'Planetary transmissions with clutched input and two brakes'2004 6,780,138'Family of multi-speed planetary transmission mechanisms having three planetary gearsets, three clutches, and two brakes'2004 6,776,738'Family of multi-speed transmissions with a stationary planetary member and input clutches'2004 6,773,371'Family of multi-speed transmissions having interconnected planetary gearsets and input clutches'2004 6,767,306'Transmission mechanisms with three gear sets and a stationary gear member'2004 6,758,785'Multi-speed transmission with three planetary gearsets and input clutches'2004 6,752,739'Transmission mechanisms with three gear sets and a stationary gear member'2004 6,746,361'Planetary transmissions with three gear sets and a stationary interconnecting member'2004 6,746,360'Transmission mechanisms with clutched input and a stationary planetary gear member'2004 6,746,358'Planetary transmissions with three interconnected gear sets and six selectable torque transmitting devices'2004 6,746,362'Six speed planetary transmission mechanisms with two fixed interconnections'2004 6,743,146'Seven-speed planetary transmissions with a stationary interconnection'2004 6,743,147'Family of multi-speed planetary transmissions having a clutched input and one stationary member'2004 6,743,141'Planetary transmissions with clutched input and three brakes'2004 6,743,145'Planetary transmissions with three interconnected gear sets and a stationary member'2004 6,736,752'Family of multi-speed transmissions with three planetary gearsets'2004 6,736,749'Family of multi-speed transmission mechanisms having three planetary gear sets and six torque-transmitting mechanisms'2004 6,736,750'Family of multi-speed planetary transmission mechanisms having clutch input'2004 6,729,993'Planetary transmissions with three interconnected gear sets'2004 6,729,994'Multi-speed transmission mechanisms with three planetary gearsets and clutch input'2004 6,723,019'Seven speed transmission mechanisms with three interconnected planetary gear sets'2004 6,716,131'Family of multi-speed power transmissions with three gearsets'2004 6,716,130'Family of multi-speed transmissions with interconnected planetary gearsets and a plurality of input clutches'2004 6,716,133'Family of five-speed transmission mechanisms having three planetary gear sets and a stationary member'2004 6,712,733'Family of five-speed transmission mechanisms having a stationary interconnecting member'2004 6,712,732'Family of multi-speed planetary transmissions each having two input clutches and three planetary gearsets'2004 6,712,731'Transmission mechanisms with three planetary gear sets'2004 6,709,360'Family of multi-speed transmission mechanisms with three input clutches and three planetary gearsets'2004 6,709,359'Family of multi-speed transmission mechanisms having three planetary gear sets and five torque-transmitting mechanisms'2004 6,709,361'Family of multi-speed transmission mechanisms having two input clutches'2004 6,709,358'Family of multi-speed transmission mechanisms having three planetary gearsets and five torque-transmitting mechanisms'2004 6,705,967'Six-speed transmission with three planetary gear sets and five torque transmitting mechanisms'2004 6,705,969'Family of multi-speed transmission mechanisms having three planetary gearsets and three input torque-transmitting mechanisms'2004 6,705,968'Family of multi-speed transmission mechanisms having three planetary gear sets with two clutches and two brakes'2004 6,702,710'Multi-speed planetary transmissions with a stationary interconnection'2004 6,695,741'Family of five-speed transmission mechanisms having three planetary gear sets'2004 6,689,010'Multi-speed planetary transmissions with clutched input and three planetary gearsets'2004 6,689,011'Planetary transmissions with three gear sets and a stationary fixed interconnection'2004 6,688,267'Engine valve actuator assembly'2004 6,682,455'Family of six-speed planetary transmissions having three planetary gearsets and five torque-transmitting mechanisms'2004 6,679,803'Family of multi-speed power transmission mechanisms having three interconnected planetary gearsets'2004 6,679,802'Family of multi-speed planetary transmission mechanisms having fixed interconnections and six torque-transmitting mechanisms'2004 6,672,988'Multi-speed planetary transmissions with a stationary member'2004 6,672,987'Multi-speed transmissions with a stationary planetary member'2004 6,669,597'Transmission mechanisms with three planetary gear sets and a stationary fixed interconnection'2003 6,669,595'Planetary transmissions with a stationary member and clutched input'2003 6,666,788'Family of five-speed transmission mechanisms having three planetary gear sets and four torque-transmitting devices'2003 6,659,905'Family of five-speed transmission mechanisms having three planetary gear sets and four clutches'2003 6,659,904'Multi-speed planetary transmissions with three interconnected gear sets'2003 6,659,903'Multi-speed transmissions with three gear sets and a stationary planetary member'2003 6,656,078'Family of six-speed planetary transmissions having three planetary gearsets and three input torque-transmitting mechanisms'2003 6,656,077'Family of multi-speed transmission mechanisms having input clutches and three planetary gearsets'2003 6,652,409'Family of multi-speed planetary transmission mechanisms having four clutches and two brakes'2003 6,652,411'Multi-speed transmission family with three planetary gear sets and five rotating torque transmitting mechanisms'2003 6,648,790'Family of multi-speed transmission mechanisms having three planetary gear sets and six torque-transmitting devices'2003 6,648,793'Multi-speed planetary transmissions with fixed input and stationary members'2003 6,648,792'Family of multi-speed transmission mechanisms with three planetary gear sets and a stationary member'2003 6,648,789'Multi-speed transmissions with three interconnected planetary gear sets'2003 6,648,791'Family of multi-speed power transmission mechanisms having three planetary gear sets'2003 6,645,118'Family of five-speed transmission mechanisms having three planetary gear sets and a stationary interconnecting member'2003 6,645,115'Family of multi-speed power transmission mechanisms having three planetary gearsets and five torque-transmitting mechanisms'2003 6,645,116'Six speed planetary transmission mechanisms with three interconnected gearsets'2003 6,645,117'Transmission mechanisms with three planetary gear sets and one fixed interconnection'2003 6,634,981'Family of transmission mechanisms with three planetary gear sets and a stationary member'2003 6,632,153'Family of five-speed transmission mechanisms having a fixed stationary member'2003 6,626,791'Family of five-speed transmission mechanisms having three interconnected planetary gear sets'2003 6,626,790'Family of five-speed transmission mechanisms having three interconnected planetary gear sets'2003 6,626,789'Family of six-speed transmission mechanisms with three planetary gearsets'2003 6,623,398'Multi-speed power transmission with three planetary gear sets'2003 6,623,397'Family of multi-speed transmission mechanisms with three non-continuously interconnected planetary gear sets'2003 6,620,075'Multi-speed transmission mechanisms with three planetary gearsets and input clutches'2003 6,595,892'Multi-speed transmission family with three planetary gear sets and five rotating torque transmitting mechanisms'2003 6,589,129'Powertrain having a multi-speed transmission with three planetary gear sets'2003 6,530,858'Family of multi-speed planetary power transmission mechanisms having three planetary gearsets'2003 6,514,170'Family of multi-speed transmission mechanisms having three planetary gear sets and five torque-transmitting mechanisms'2003 6,422,969'Powertrain with a six speed planetary transmission having three planetary gear sets'2002 6,360,705'Mechanism for variable valve lift and cylinder deactivation'2002

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2002–2007Patents assigned to GEN MOTORS CORP (123)· patent assignee history

2002–2021Based in West Bloomfield, MI, US· patent location history

2007–2016Patents assigned to GM GLOBAL TECH OPERATIONS INC (144)· patent assignee history

2011–2015Patents assigned to RAGHAVAN MADHUSUDAN (23)· patent assignee history

2012–2013Patents assigned to SALAMANDRA KONSTANTIN BORISOVICH (11)· patent assignee history

2012–2013Patents assigned to ASTASHEV VLADIMIR KONSTANTINOVICH (10)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
GM GLOBAL TECH OPERATIONS INC	144	2007–2016
GEN MOTORS CORP	123	2002–2007
RAGHAVAN MADHUSUDANself	23	2011–2015
SALAMANDRA KONSTANTIN BORISOVICH	11	2012–2013
ASTASHEV VLADIMIR KONSTANTINOVICH	10	2012–2013

Locations

Location	Patents	Span
West Bloomfield, MI, US	275	2002–2021