Spreadbury; Robert J.

Patent Applications and Registrations

Patent applications and USPTO patent grants for Spreadbury; Robert J..The latest application filed is for "starting and operating method and apparatus for discharge lamps".

Company Profile

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Spreadbury; Robert J. - Murrysville PA
Spreadbury; Robert J. - Franklin Township Westmoreland County
Spreadbury; Robert J. - Pittsburgh PA

*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
Starting and operating method and apparatus for discharge lamps Grant 4,525,650 - Hicks , et al. June 25, 1	1985-06-25
Ballast modifying device and lead-type ballast for programming and controlling the operating performance of an hid sodium lamp Grant 4,501,994 - Spreadbury February 26, 1	1985-02-26
Packaged add-on device for lead-type ballast and luminaire which incorporates such packaged add-on device Grant 4,455,595 - Engel , et al. June 19, 1	1984-06-19
Discharge device ballast component which provides both voltage transformation and variable inductive reactance Grant 4,350,934 - Spreadbury September 21, 1	1982-09-21
High-power AC voltage stabilizer Grant 4,286,207 - Spreadbury , et al. August 25, 1	1981-08-25
Inductive coupler Grant 4,030,058 - Riffe , et al. June 14, 1	1977-06-14
High voltage current limiting circuit breaker utilizing a super conductive resistance element Grant 3,925,707 - Bhate , et al. December 9, 1	1975-12-09
High Integrity Alternating Current Power Supplies Grant 3,745,365 - Spreadbury , et al. July 10, 1	1973-07-10
Regulating And Filtering Transformer Having A Magnetic Core Constructed To Facilitate Adjustment Of Non-magnetic Gaps Therein Grant 3,686,561 - Spreadbury * August 22, 1	1972-08-22
Regulating Transformer With Non-saturating Input And Output Regions Grant 3,659,191 - Spreadbury April 25, 1	1972-04-25
Regulating And Filtering Transformer Grant 3,584,290 - Spreadbury June 8, 1	1971-06-08

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