Inventor · disambiguated record
Clark G. Hochgraf
Also filed as: HOCHGRAF CLARK · HOCHGRAF CLARK G · HOCHGRAF CLARK GLENN
12 granted patents·4 pending applications·221 citations·filing 1998–2010
90Inventor score
Files withGM GLOBAL TECH OPERATIONS INC5GEN MOTORS CORP2HOCHGRAF CLARK G2VISTEON GLOBAL TECH INC2EDWARDS LEROY M1
Top patents by PatentIndex Score
16 records- 0188US6794844B2Method and system for fuel cell controlVISTEON GLOBAL TECH INC·Filed 2001·Granted Sep 21, 2004·36 cites·14 claims
- 0286US6072707AHigh voltage modular inverterSIEMENS POWER TRANSM & DISTRIB·Filed 1998·Granted Jun 6, 2000·94 cites·2 claims
- 0379US6603290B2Anti-islanding detection scheme for distributed power generationVISTEON GLOBAL TECH INC·Filed 2001·Granted Aug 5, 2003·46 cites·19 claims
- 0474US7421356B2Method and apparatus for measurement of fuel cell high frequency resistance in the presence of large undesirable signalsGM GLOBAL TECH OPERATIONS INC·Filed 2006·Granted Sep 2, 2008·3 cites·11 claims
- 0572US7968240B2System and method for shorting a fuel cell stackGM GLOBAL TECH OPERATIONS INC·Filed 2008·Granted Jun 28, 2011·2 cites·8 claims
- 0671US7883809B2Rapid startup of a fuel cell power module using motor driveGM GLOBAL TECH OPERATIONS INC·Filed 2005·Granted Feb 8, 2011·2 cites·16 claims
- 0760US7132191B2Addressing one MEA failure mode by controlling MEA catalyst layer overlapGEN MOTORS CORP·Filed 2003·Granted Nov 7, 2006·4 cites·14 claims
- 0856US7442456B2Current control for parallel fuel cell stacksGEN MOTORS CORP·Filed 2004·Granted Oct 28, 2008·3 cites·38 claims
- 0954US5905367APower inverter apparatus using a transformer with its primary winding connected the source end and a secondary winding connected to the load end of an AC power line to insert series compensationSIEMENS WESTINGHOUSE POWER·Filed 1998·Granted May 18, 1999·30 cites·19 claims
- 1052US2010035090A1Off-state degradation prevention in a fuel cell without on-state losses using self controlled elementGM GLOBAL TECH OPERATIONS INC·Filed 2008·Application pending·0 cites
- 1147US8828616B2Life extension of PEM fuel cell using startup methodHOCHGRAF CLARK G·Filed 2008·Granted Sep 9, 2014·0 cites·12 claims
- 1244US2005214602A1Load following algorithm for a fuel cell based distributed generation systemSINHA MANISH·Filed 2004·Application pending·0 cites
- 1344US2008311441A1Fuel cell system using cathode exhaust for anode recirculationHOCHGRAF CLARK G·Filed 2007·Application pending·0 cites
- 1443US7972749B2Low voltage power tap on high voltage stackGM GLOBAL TECH OPERATIONS INC·Filed 2004·Granted Jul 5, 2011·0 cites·13 claims
- 1540US2012064424A1Low cost method and signal processing algorithm to rapidly detect abnormal operation of an individual fuel cell in a plurality of series connected fuel cellsFUSS ROBERT L·Filed 2010·Application pending·0 cites
- 1637US8486575B2Passive hydrogen vent for a fuel cellEDWARDS LEROY M·Filed 2004·Granted Jul 16, 2013·1 cites·15 claims
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