Inventor

Edward K. Howell

Inventor

Simsbury, CT, US

Overview

1976–2010

Patent span

Electricity

Primary field (CPC H)

Patents· 64 as inventor

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

H01Hprimary

H01HElectric switches47%

H02HEmergency protective circuit arrangements32%

G01RMeasuring electric variables5%

H04BTransmission5%

H03KPulse technique3%

H01CResistors1%

H02PControl or regulation of electric motors, electric generators or dynamo-electric converters1%

H03HImpedance networks, e.g. resonant circuits1%

H04LTransmission of digital information, e.g. telegraphic communication1%

H10DInorganic electric semiconductor devices1%

PatentTitleYear

7,643,256'Electromechanical switching circuitry in parallel with solid state switching circuitry selectively switchable to carry a load appropriate to such circuitry'2010 7,542,250'Micro-electromechanical system based electric motor starter'2009 7,473,859'Gating voltage control system and method for electrostatically actuating a micro-electromechanical device'2009 7,091,871'Electrical hazard detection system'2006 5,339,210'DC circuit interrupter'1994 5,164,872'Load circuit commutation circuit'1992 4,961,100'Bidirectional field effect semiconductor device and circuit'1990 4,725,701'Low voltage vacuum circuit interrupter'1988 4,723,187'Current commutation circuit'1988 4,717,796'Low voltage vacuum circuit interrupter'1988 4,717,798'Low voltage vacuum circuit interrupter'1988 4,714,807'Low voltage vacuum circuit interrupter'1987 4,705,923'Low voltage vacuum circuit interrupter'1987 4,700,256'Solid state current limiting circuit interrupter'1987 4,698,607'High speed contact driver for circuit interruption device'1987 4,687,950'Thyristor commutation circuit'1987 4,675,776'Bistable undervoltage release circuit for circuit breakers'1987 4,667,071'Low voltage vacuum circuit interrupter'1987 4,658,227'High speed magnetic contact driver'1987 4,656,445'High speed contact driver'1987 4,656,324'Current limiting circuit interrupter'1987 4,652,962'High speed current limiting circuit interrupter'1987 4,646,041'High speed contact driver for circuit interruption device'1987 4,645,889'Varistor quenched arc chute for current limiting circuit interrupters'1987 4,644,309'High speed contact driver for circuit interruption device'1987 4,639,933'Steering logic circuit for a digital data transceiver'1987 4,638,244'Ground connection monitor'1987 4,636,906'Solid state circuit interruption employing a stored charge power transistor'1987 4,636,907'Arcless circuit interrupter'1987 4,631,622'Multiple static trip circuit breaker coordination'1986 4,631,621'Gate turn-off control circuit for a solid state circuit interrupter'1986 4,620,122'Piezoelectric contact driver for circuit interrupters'1986 4,609,839'Noise inverter circuit for a power line communication system'1986 4,607,148'Change of state contact material for electric circuit interrupters'1986 4,598,187'Current limiting circuit breaker'1986 4,583,232'Carrier current digital data transceiver'1986 4,583,146'Fault current interrupter'1986 4,583,066'Thermal release for flux shift trip unit within static trip circuit breakers'1986 4,578,653'Frequency selective filter circuit'1986 4,433,326'Power line communication system using the neutral and ground conductors of a residential branch circuit'1984 4,429,340'Bargraph displays for static trip circuit breakers'1984 4,428,019'Ground fault circuit interrupting device with improved integrated circuit power supply'1984 4,408,186'Power line communication over ground and neutral conductors of plural residential branch circuits'1983 4,348,708'Ground fault circuit interrupting device with improved coordination of electronic circuit operation'1982 4,345,289'Ground fault circuit interrupting device with improved thyristor triggering'1982 4,297,741'Rate sensing instantaneous trip mode network'1981 4,292,612'Remotely switchable residential circuit breaker'1981 4,288,833'Lightning arrestor'1981 4,288,769'Ambient temperature responsive trip device for static trip circuit breakers'1981 4,274,121'Target circuit for circuit breaker static trip unit'1981 4,272,797'Fast recovery peak detector'1981 4,271,447'Power supply for circuit breaker static trip unit'1981 4,271,444'Ground fault trip mode network for static trip circuit breakers'1981 4,266,259'Long-time and short-time overcurrent signal processor for circuit breaker static trip units'1981 4,216,516'Portable ground fault protector'1980 4,168,514'Combination circuit breaker-lightning arrestor'1979 4,150,411'Ground fault circuit interrupter utilizing a single transformer'1979 4,115,829'Overcurrent and ground fault responsive trip unit for circuit breakers'1978 4,001,646'Ground fault circuit interrupter utilizing a single transformer'1977 3,986,152'Negative impedance network'1976 3,973,171'Ground fault circuit interrupting device with grounded neutral detection'1976 3,963,959'Ground fault circuit interrupting device and differential current sensor therefor'1976 3,953,766'Ground fault circuit interrupter and electronic module therefor'1976 3,950,677'Housing mounting arrangement for ground fault circuit interrupter'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–2010Patents assigned to GEN ELECTRIC (63)· patent assignee history

1976–1992Based in Simsbury, CT, US· patent location history

1994–2010Based in Hendersonville, NC, US· patent location history

2006Patents assigned to HOWELL EDWARD KEITH (1)· patent assignee history

2006Patents assigned to ROBERTS EARL W (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
GEN ELECTRIC	63	1976–2010
HOWELL EDWARD KEITHself	1	2006
ROBERTS EARL W	1	2006

Locations

Location	Patents	Span
Simsbury, CT, US	59	1976–1992
Hendersonville, NC, US	5	1994–2010