Inventor · disambiguated record
John L. Lumsden
Also filed as: LUMSDEN JOHN · LUMSDEN JOHN L
20 granted patents·3 pending applications·847 citations·filing 1985–2017
96Inventor score
Files withLUMSDEN JOHN L7THE POWERWISE GROUP INC4POWERWISE GROUP INC3SONY ELECTRONICS INC3ENVIROPOWER CORP1
Top patents by PatentIndex Score
23 records- 0192US8698447B2Energy saving system and method for devices with rotating or reciprocating massesLUMSDEN JOHN L·Filed 2012·Granted Apr 15, 2014·11 cites·20 claims
- 0291US5481225AVariable gain differential amplifier circuitSONY ELECTRONICS INC·Filed 1994·Granted Jan 2, 1996·64 cites·16 claims
- 0390US8619443B2System and method to boost voltageLUMSDEN JOHN L·Filed 2010·Granted Dec 31, 2013·12 cites·37 claims
- 0490US6351400B1Method and apparatus for a solar power conditionerEVIROPOWER CORP·Filed 2000·Granted Feb 26, 2002·94 cites·30 claims
- 0589US8120307B2System and method for providing constant loading in AC power applicationsLUMSDEN JOHN L·Filed 2008·Granted Feb 21, 2012·21 cites·18 claims
- 0689US8085009B2IGBT/FET-based energy savings device for reducing a predetermined amount of voltage using pulse width modulationLUMSDEN JOHN L·Filed 2008·Granted Dec 27, 2011·23 cites·77 claims
- 0789US6662821B2System and method for closing an existing valve in response to a detected leakRAPID EMERGENCY SHUTOFF SYSTEM·Filed 2001·Granted Dec 16, 2003·114 cites·50 claims
- 0889US6489742B2Efficiency maximizing motor controller and methodLUMSDEN JOHN·Filed 2000·Granted Dec 3, 2002·72 cites·18 claims
- 0989US5299266AMulti machine monitor for TV post productionSONY ELECTRONICS INC·Filed 1992·Granted Mar 29, 1994·265 cites·17 claims
- 1087US8004255B2Power supply for IGBT/FET driversPOWERWISE GROUP INC·Filed 2008·Granted Aug 23, 2011·17 cites·20 claims
- 1185US6678176B2Method and apparatus for a solar power conditionerENVIROPOWER CORP·Filed 2001·Granted Jan 13, 2004·61 cites·36 claims
- 1284US4659981AInput transformer circuitSONY CORP·Filed 1985·Granted Apr 21, 1987·31 cites·9 claims
- 1383US8823314B2Energy saving system and method for devices with rotating or reciprocating massesLUMSDEN JOHN L·Filed 2010·Granted Sep 2, 2014·6 cites·23 claims
- 1478US8085010B2TRIAC/SCR-based energy savings device for reducing a predetermined amount of voltage using pulse width modulationLUMSDEN JOHN L·Filed 2008·Granted Dec 27, 2011·14 cites·66 claims
- 1569US9716449B2Energy saving system and method for devices with rotating or reciprocating massesTHE POWERWISE GROUP INC·Filed 2014·Granted Jul 25, 2017·2 cites·20 claims
- 1668US5227735ATechnique to drive transformer coupled line amplifierSONY CORP AMERICA·Filed 1992·Granted Jul 13, 1993·20 cites·10 claims
- 1754US2017338740A1Igbt/fet-based energy savings device for reducing a predetermined amount of voltage using pulse width modulationTHE POWERWISE GROUP INC·Filed 2017·Application pending·0 cites
- 1853US9628015B2Energy saving system and method for devices with rotating or reciprocating massesTHE POWERWISE GROUP INC·Filed 2014·Granted Apr 18, 2017·0 cites·20 claims
- 1953US2014346896A1System and method to manage energy usagePOWERWISE GROUP INC·Filed 2014·Application pending·0 cites
- 2052US9716431B2IGBT/FET-based energy savings device for reducing a predetermined amount of voltage using pulse width modulationTHE POWERWISE GROUP INC·Filed 2014·Granted Jul 25, 2017·0 cites·20 claims
- 2149US8723488B2IGBT/FET-based energy savings device for reducing a predetermined amount of voltage using pulse width modulationLUMSDEN JOHN L·Filed 2011·Granted May 13, 2014·0 cites·96 claims
- 2247US5259034AVoice over circuitry with adjustable depth of fadeSONY ELECTRONICS INC·Filed 1991·Granted Nov 2, 1993·20 cites·8 claims
- 2347US2011182094A1System and method to manage power usagePOWERWISE GROUP INC·Filed 2011·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →