Inventor · disambiguated record
Henry J. Zylstra
Also filed as: BORRETT RONALD D · JANSEN HARLEY W · ZYLSTRA HENRY · ZYLSTRA HENRY J
26 granted patents·1 pending application·526 citations·filing 1978–2010
97Inventor score
Top patents by PatentIndex Score
27 records- 0192US4213165ACircuit breaker having an electronic fault sensing and trip initiating unitSQUARE D·Filed 1978·Granted Jul 15, 1980·47 cites·2 claims
- 0289US4631624ATime delay undervoltage releaseSQUARE D CO·Filed 1984·Granted Dec 23, 1986·57 cites·17 claims
- 0389US4208689ACircuit breaker having an electronic fault sensing and trip initiating unitSQUARE D·Filed 1978·Granted Jun 17, 1980·45 cites·5 claims
- 0488US4208693ACircuit breaker having an electronic fault sensing and trip initiating unitSQUARE D·Filed 1978·Granted Jun 17, 1980·44 cites·3 claims
- 0584US8395065B2Portable remote racking device for a circuit breakerZYLSTRA HENRY J·Filed 2010·Granted Mar 12, 2013·13 cites·20 claims
- 0683US4992723AFault-powered power supplySQUARE D CO·Filed 1989·Granted Feb 12, 1991·56 cites·27 claims
- 0781US4466042ATrip indicator assembly for electronic circuit breakerSQUARE D CO·Filed 1983·Granted Aug 14, 1984·24 cites·6 claims
- 0878US8238066B2Current sensor for earth leakage moduleZYLSTRA HENRY J·Filed 2009·Granted Aug 7, 2012·9 cites·22 claims
- 0977US4931893ALoss of neutral or ground protection circuitSQUARE D CO·Filed 1989·Granted Jun 5, 1990·37 cites·15 claims
- 1072US4197567APortable ground fault circuit interrupterSQUARE D·Filed 1978·Granted Apr 8, 1980·16 cites·4 claims
- 1171US4746891AHigh saturation three coil current transformerSQUARE D CO·Filed 1985·Granted May 24, 1988·20 cites·11 claims
- 1261US4912380AField installable electrical operator for a circuit breakerSQUARE D CO·Filed 1989·Granted Mar 27, 1990·12 cites·11 claims
- 1361US4209818ACircuit breaker having an electronic fault sensing and trip initiating unitSQUARE D·Filed 1978·Granted Jun 24, 1980·15 cites·26 claims
- 1460US4910443AElectronic control circuit for a bidirectional motorSQUARE D CO·Filed 1989·Granted Mar 20, 1990·12 cites·4 claims
- 1560US4897756AAdd-on ground fault moduleSQUARE D CO·Filed 1989·Granted Jan 30, 1990·19 cites·11 claims
- 1658US6654217B2Quick responding instantaneous trip systemSQUARE D CO·Filed 2000·Granted Nov 25, 2003·9 cites·15 claims
- 1757US4901219APlug-in power supplySQUARE D CO·Filed 1987·Granted Feb 13, 1990·12 cites·32 claims
- 1856US8400744B2Earth leakage detection module with robust transient suppressionZYLSTRA HENRY J·Filed 2010·Granted Mar 19, 2013·1 cites·18 claims
- 1953US5016135APower supply incorporating circuit breaker and fault detection circuitSQUARE D CO·Filed 1990·Granted May 14, 1991·15 cites·5 claims
- 2052US5519368ACompact coil assembly for transient voltage protectionSQUARE D CO·Filed 1994·Granted May 21, 1996·11 cites·20 claims
- 2152US4208690ACircuit breaker having an electronic fault sensing and trip initiating unitSQUARE D·Filed 1978·Granted Jun 17, 1980·11 cites·4 claims
- 2250US4486803AElectronic system for high amperage circuit interruption apparatusSQUARE D CO·Filed 1983·Granted Dec 4, 1984·13 cites·8 claims
- 2344USRE35190EPlug-in power supplySQUARE D CO·Filed 1992·Granted Mar 26, 1996·8 cites·33 claims
- 2442US4538194AGround fault desensitization circuit for electronic breakerSQUARE D CO·Filed 1983·Granted Aug 27, 1985·9 cites·20 claims
- 2536US5019936AVoltage-to-frequency squared circuitSQUARE D CO·Filed 1989·Granted May 28, 1991·8 cites·25 claims
- 2630US2002080535A1Multiple ground fault trip function system and method for sameFiled 2000·Application pending·0 cites
- 2729US4652965AHigh level magnetic trip circuitSQUARE D CO·Filed 1985·Granted Mar 24, 1987·3 cites·8 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →