Inventor
William C. Alexander
Inventor
Spicewood, TX, US
Overview
Patents· 93 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 systems23%
H01LSemiconductor devices12%
H03KPulse technique12%
H10DInorganic electric semiconductor devices12%
Y02BClimate change mitigation technologies related to buildings, e.g. housing, house appliances or related end-user applications11%
Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution5%
H02JElectric power networks4%
G06FElectric digital data processing3%
G01RMeasuring electric variables2%
G05FSystems for regulating electric or magnetic variables2%
PatentTitleYear
D0930587Portable generator202111,069,797Ruggedized symmetrically bidirectional bipolar power transistor202110,892,354Field plates on two opposed surfaces of double-base bidirectional bipolar transistor: devices, methods, and systems202110,580,885Field plates on two opposed surfaces of double-base bidirectional bipolar transistor: devices, methods, and systems202010,497,699Double-base-connected bipolar transistors with passive components preventing accidental turn-on201910,418,471Field plates on two opposed surfaces of double-base bidirectional bipolar transistor: devices, methods, and systems201910,211,283Operation of double-base bipolar transistors with additional timing phases at switching transitions201910,056,372Double-base-connected bipolar transistors with passive components preventing accidental turn-on20189,899,932'Universal power conversion apparatus'20189,900,002'Methods of operating a double-base-contact bidirectional bipolar junction transistor'20189,899,868'Smart transfer switch devices, systems, and methods using double-base bipolar transistors'20189,818,615'Systems and methods for bidirectional device fabrication'20179,799,731'Multi-level inverters using sequenced drive of double-base bidirectional bipolar transistors'20179,796,258'Bidirectional power converters with electric vehicle chargers'20179,787,298'Operation of double-base bipolar transistors with additional timing phases at switching transitions'20179,787,304'Methods, systems, and devices for active charge control diodes'20179,786,773'Thin-substrate double-base high-voltage bipolar transistors'20179,742,385'Bidirectional semiconductor switch with passive turnoff'20179,742,395'Circuits, methods, and systems with optimized operation of double-base bipolar junction transistors'20179,678,519'Voltage control modes for microgrid applications'20179,660,551'Operating point optimization with double-base-contact bidirectional bipolar junction transistor circuits, methods, and systems'20179,647,526'Power-packet-switching power converter performing self-testing by admitting some current to the link inductor before full operation'20179,647,568'Bi-directional multi-port applications'20179,647,553'Bidirectional two-base bipolar junction transistor operation, circuits, and systems with double base short at initial turn-off'20179,614,458'Methods for determining maximum power point tracking in power converters'20179,520,764'Bi-directional multi-port applications'20169,444,449'Circuits, methods, and systems with optimized operation of double-base bipolar junction transistors'20169,431,888'Single-phase to three phase converter AC motor drive'20169,407,133'Active power conditioner'20169,397,580'Dual link power converter'20169,374,085'Bidirectional two-base bipolar junction transistor operation, circuits, and systems with double base short at initial turn-off'20169,374,084'Bidirectional two-base bipolar junction transistor operation, circuits, and systems with diode-mode turn-on'20169,369,125'Bidirectional two-base bipolar junction transistor operation, circuits, and systems with collector-side base driven'20169,356,595'Bidirectional two-base bipolar junction transistor devices, operation, circuits, and systems with collector-side base driven, diode-mode turn-on, double base short at initial turn-off, and two base junctions clamped by default'20169,355,853'Systems and methods for bidirectional device fabrication'20169,293,946'Systems and methods for uninterruptible power supplies with bidirectional power converters'20169,270,142'Systems and methods for uninterruptible power supplies with bidirectional power converters'20169,231,582'Bidirectional two-base bipolar junction transistor devices, operation, circuits, and systems with diode-mode turn-on and collector-side base driven'20169,219,406'Systems and methods for assessing current in a resonant circuit'20159,209,713'Bidirectional bipolar junction transistor operation, circuits, and systems with two base junctions clamped by default'20159,209,798'Bidirectional bipolar junction transistor operation, circuits, and systems with two base junctions clamped by default'20159,203,400'Bidirectional two-base bipolar junction transistor operation, circuits, and systems with diode-mode turn-on'20159,203,401'Bidirectional two-base bipolar junction transistor operation, circuits, and systems with double base short at initial turn-off'20159,190,894'Bidirectional two-base bipolar junction transistor operation, circuits, and systems with collector-side base driven'20159,130,461'Universal power conversion methods with disconnect after driving'20159,124,095'Islanding detection in power converters'20159,118,247'Power conversion with added pseudo-phase'20159,077,185'Systems and methods for uninterruptible power supplies with bidirectional power converters'20159,059,710'Systems, circuits, devices, and methods with bidirectional bipolar transistors'20159,054,706'Systems, circuits, devices, and methods with bidirectional bipolar transistors'20159,054,707'Systems, circuits, devices, and methods with bidirectional bipolar transistors'20159,042,131'Power-packet-switching converter with sequenced connection to link inductor'20159,035,350'Systems, circuits, devices, and methods with bidirectional bipolar transistors'20159,029,909'Systems, circuits, devices, and methods with bidirectional bipolar transistors'20159,007,796'Power conversion with current sensing coupled through saturating element'20158,531,858'Power conversion with current sensing coupled through saturating element'20138,514,601'Power conversion with added pseudo-phase'20138,487,837'Optical six-degree of freedom tracking apparatus and method'20138,471,408'Photovoltaic array systems, methods, and devices with bidirectional converter'20138,461,718'Photovoltaic array systems, methods, and devices with bidirectional converter'20138,451,637'Power transfer devices, methods, and systems with crowbar switch shunting energy-transfer reactance'20138,446,043'Photovoltaic array systems, methods, and devices and improved diagnostics and monitoring'20138,446,745'Power transfer devices, methods, and systems with crowbar switch shunting energy-transfer reactance'20138,446,042'Photovoltaic array systems, methods, and devices with improved diagnostics and monitoring'20138,441,819'Power transfer devices, methods, and systems with crowbar switch shunting energy-transfer reactance'20138,432,711'Power transfer devices, methods, and systems with crowbar switch shunting energy-transfer reactance'20138,406,025'Power conversion with added pseudo-phase'20138,400,800'Universal power converter with two input drive operations during each half-cycle'20138,395,910'Buck-boost power converter circuits, methods and systems'20138,391,033'Power transfer devices, methods, and systems with crowbar switch shunting energy-transfer reactance'20138,345,452'Universal power converter with bidirectional switching devices'20138,300,426'Converter for enhanced efficiency power conversion'20128,295,069'Power conversion with added pseudo-phase'20127,778,045'Universal power conversion methods'20107,730,281'System and method for storing immediate data'20107,599,196'Universal power converter'20097,321,963'System and method for storing immediate data'20087,298,803'Methods and apparatuses for filtering common mode interference'20077,276,681'On-board light source based gain correction for semi-active laser seekers'20077,155,372'Methods and apparatuses for filtering pulses'20067,138,791'Logic controlled high voltage resonant switching power supply'20067,114,057'System and method for storing immediate data'20066,909,267'Logic controlled high voltage resonant switching power supply'20056,898,700'Efficient saving and restoring state in task switching'20056,870,358'Methods and apparatuses for peak detection among multiple signals'20056,779,103'Control word register renaming'20046,711,669'System and method for storing immediate data'20046,338,132'System and method for storing immediate data'20025,721,857'Method and apparatus for saving the effective address of floating point memory operations in an out-of-order microprocessor'19984,716,515'Switched capacitor induction motor drive'19874,597,039'Switched capacitor induction motor drive'19864,318,394'Solar energy concentrator'19824,275,376'Electrical signal interconnection coupler'1981Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1982–2013Patents assigned to ALEXANDER WILLIAM C (17)· patent assignee history
1982–1987Based in Austin, TX, US· patent location history
1998–2010Patents assigned to INTEL CORP (8)· patent assignee history
1998Based in Portland, OR, US· patent location history
2002–2010Based in Hillsboro, OR, US· patent location history
2005–2007Patents assigned to BAE SYSTEMS INFORMATION (6)· patent assignee history
2005–2021Based in Spicewood, TX, US· patent location history
2009–2015Patents assigned to IDEAL POWER CONVERTERS INC (19)· patent assignee history
2013–2021Patents assigned to IDEAL POWER INC (55)· patent assignee history
2021Based in Elmhurst, IL, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| IDEAL POWER INC | 55 | 2013–2021 |
| IDEAL POWER CONVERTERS INC | 19 | 2009–2015 |
| ALEXANDER WILLIAM Cself | 17 | 1982–2013 |
| INTEL CORP | 8 | 1998–2010 |
| BAE SYSTEMS INFORMATION | 6 | 2005–2007 |
Locations
| Location | Patents | Span |
|---|---|---|
| Spicewood, Texas, US | 80 | 2005–2021 |
| Hillsboro, OR, US | 7 | 2002–2010 |
| Austin, Texas, US | 3 | 1982–1987 |
| Elmhurst, Illinois, US | 1 | 2021 |
| Portland, OR, US | 1 | 1998 |