Keegan; Patrick J.

Patent Applications and Registrations

Patent applications and USPTO patent grants for Keegan; Patrick J..The latest application filed is for "boiler system ignition sequence detector and associated methods of protecting boiler systems".

Company Profile

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Keegan; Patrick J. - Van Nuys CA
Keegan; Patrick J. - Schaumburg IL
Keegan; Patrick J. - North Hollywood CA
Keegan; Patrick J. - Sepulveda CA

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
Boiler system ignition sequence detector and associated methods of protecting boiler systems Grant 6,600,960 - Keegan July 29, 2	2003-07-29
Electronic ballast producing voltage having trapezoidal envelope for instant start lamps Grant 5,982,113 - Crouse , et al. November 9, 1	1999-11-09
Electronic ballast with filament cut-out Grant 5,973,455 - Mirskiy , et al. October 26, 1	1999-10-26
Electronic ballast that manages switching frequencies for extrinsic purposes Grant 5,936,357 - Crouse , et al. August 10, 1	1999-08-10
Microprocessor controlled electronic ballast Grant 5,925,990 - Crouse , et al. July 20, 1	1999-07-20
Electronic ballast with reversely wound filament winding Grant 5,789,866 - Keith , et al. August 4, 1	1998-08-04
Optical data receiver employing a solar cell resonant circuit and method for remote optical data communication Grant 5,602,670 - Keegan February 11, 1	1997-02-11
Protective system for hot tub water and power supply Grant 4,663,613 - Raleigh , et al. May 5, 1	1987-05-05
Electronic temperature control Grant 4,421,270 - Raleigh , et al. December 20, 1	1983-12-20
Electronic temperature control Grant 4,361,274 - Raleigh , et al. November 30, 1	1982-11-30

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