Inventor

P. John Dhyanchand

Inventor

Rockford, IL, US

Overview

43→

Patents

1977–1997

Patent span

Electricity

Primary field (CPC H)

Patents· 43 as inventor

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

H02Mprimary

H02MApparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use with mains or similar power supply systems44%

H02PControl or regulation of electric motors, electric generators or dynamo-electric converters14%

F02NStarting of combustion engines11%

H01FMagnets8%

H03KPulse technique6%

F02CGas-turbine plants3%

Y02BClimate change mitigation technologies related to buildings, e.g. housing, house appliances or related end-user applications3%

Y02PClimate change mitigation technologies in the production or processing of goods3%

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

H02HEmergency protective circuit arrangements2%

PatentTitleYear

5,666,278'High voltage inverter utilizing low voltage power switches'1997 5,657,214'Stepped waveform PWM inverter'1997 5,600,548'DC content control for an inverter'1997 5,559,686'Stepped waveform inverter control'1996 5,355,296'Switching converter and summing transformer for use therein'1994 5,317,299'Electromagnetic transformer'1994 5,301,098'Feedforward inverter phase control'1994 5,282,125'Power generation system with soft-start circuit'1994 5,281,905'Induction machine based hybrid aircraft engine starting/generating power system'1994 5,239,454'Stepped-waveform inverter utilizing main and auxiliary subinverters'1993 5,225,973'Regulation circuit for a stepped-waveform inverter'1993 5,182,535'Summing transformer core for star-delta inverter having a separate secondary winding for each primary winding'1993 5,177,460'Summing transformer for star-delta inverter having a single secondary winding for each group of primary windings'1993 5,097,241'Cooling apparatus for windings'1992 5,057,808'Transformer with voltage balancing tertiary winding'1991 5,055,700'Brushless generator having prime mover start capability'1991 5,045,991'Unity power factor AC/DC converter'1991 5,041,957'Stepped-waveform inverter with six subinverters'1991 5,041,958'Stepped-waveform inverter with four subinverters'1991 5,040,105'Stepped-waveform inverter with eight subinverters'1991 5,031,086'Hybrid power system'1991 5,027,265'Regulator for stepped-waveform inverter'1991 5,015,941'Power conversion system with bi-directional power converter having prime mover start capability'1991 5,013,929'Power conversion system having prime mover start capability'1991 5,012,177'Power conversion system using a switched reluctance motor/generator'1991 5,008,797'Power converter utilizing line replaceable units'1991 4,968,926'Power conversion system with stepped waveform DC to AC converter having prime mover start capability'1990 4,969,081'Inverter switch current sensor with shoot-through current limiting'1990 4,947,100'Power conversion system with stepped waveform inverter having prime mover start capability'1990 4,947,055'Base drive circuit for Darlington-connected transistors'1990 4,939,441'Excitation system for a brushless generator having separate AC and DC exciter field windings'1990 4,937,468'Isolation circuit for pulse waveforms'1990 4,841,202'Speed-limited electrically compensated constant speed drive'1989 4,835,448'Brushless DC motor torque control'1989 4,725,741'Drive circuit for fast switching of Darlington-connected transistors'1988 4,695,933'Multiphase DC-DC series-resonant converter'1987 4,695,776'Power converter for an electrically-compensated constant speed drive'1987 4,694,383'Controller for a resonant converter'1987 4,692,671'Electrically-compensated constant speed drive'1987 4,670,828'Bi-directional switch for neutral point clamped PWM inverter'1987 4,651,267'Proportional base drive circuit for transistorized bridge inverter'1987 4,635,177'Control for a neutral point clamped PWM inverter'1987 4,044,296'Electronic voltage regulator for three-phase generators'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977–1997Patents assigned to SUNDSTRAND CORP (38)· patent assignee history

1977–1997Based in Rockford, IL, US· patent location history

1991–1993Patents assigned to DHYANCHAND P JOHN (4)· patent assignee history

1993Patents assigned to ARBANELLA RICHARD A (1)· patent assignee history

1993Patents assigned to MOKADAM RAGHUNATH G (1)· patent assignee history

1993Patents assigned to NG CHAI NAM (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
SUNDSTRAND CORP	38	1977–1997
DHYANCHAND P JOHNself	4	1991–1993
ARBANELLA RICHARD A	1	1993
MOKADAM RAGHUNATH G	1	1993
NG CHAI NAM	1	1993

Locations

Location	Patents	Span
Rockford, Illinois, US	43	1977–1997