Assignee
HOFFMAN CONTROLS CORP
US·8 granted patents·345 citations·filing 1981–2005
Top patents by PatentIndex Score
8 records- 0189US6684944B1Variable speed fan motor control for forced air heating/cooling systemHOFFMAN CONTROLS CORP·Filed 2000·Granted Feb 3, 2004·57 cites·7 claims
- 0289US4413514AAir flow sensorHOFFMAN CONTROLS CORP·Filed 1981·Granted Nov 8, 1983·63 cites·8 claims
- 0385US6695046B1Variable speed fan motor control for forced air heating/cooling systemHOFFMAN CONTROLS CORP·Filed 2000·Granted Feb 24, 2004·58 cites·16 claims
- 0484US4607789AProportional motor drive controlHOFFMAN CONTROLS CORP·Filed 1983·Granted Aug 26, 1986·55 cites·5 claims
- 0583US6070660AVariable speed fan motor control for forced air heating/cooling systemHOFFMAN CONTROLS CORP·Filed 1997·Granted Jun 6, 2000·67 cites·4 claims
- 0670US7248015B2Variable speed motor control circuitHOFFMAN CONTROLS CORP·Filed 2005·Granted Jul 24, 2007·9 cites·31 claims
- 0763US7191826B2Variable speed fan motor control for forced air heating/cooling systemHOFFMAN CONTROLS CORP·Filed 2004·Granted Mar 20, 2007·19 cites·12 claims
- 0854US4422571AProportional motor drive controlHOFFMAN CONTROLS CORP·Filed 1981·Granted Dec 27, 1983·17 cites·7 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →