Inventor · disambiguated record
Norman Freeman
Also filed as: FREEMAN NORMAN · FREEMAN NORMAN A
5 granted patents·2 pending applications·130 citations·filing 1976–2004
82Inventor score
Top patents by PatentIndex Score
7 records- 0191US6519539B1Measurement of fuel cell impedanceHYDROGENICS CORP·Filed 2000·Granted Feb 11, 2003·57 cites·20 claims
- 0280US6816797B2System and method for measuring fuel cell voltage and high frequency resistanceHYDROGENICS CORP·Filed 2002·Granted Nov 9, 2004·28 cites·16 claims
- 0367US7425832B2System and method for measuring internal resistance of electrochemical devicesHYDROGENICS CORP·Filed 2004·Granted Sep 16, 2008·8 cites·26 claims
- 0467US4065872AReceptacle for insecticide or repellentVCA CORP·Filed 1976·Granted Jan 3, 1978·29 cites·2 claims
- 0565US7148654B2Method and apparatus for monitoring fuel cell voltagesHYDROGENICS CORP·Filed 2003·Granted Dec 12, 2006·8 cites·28 claims
- 0643US2005007144A1Fuel cell testing system having an energy conversion system for providing a useful outputFiled 2004·Application pending·0 cites
- 0743US2005112428A1Fuel cell power system having multiple fuel cell modulesHYDROGENICS CORP·Filed 2004·Application pending·0 cites
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