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Sreeraman Venkitasubrahmanian
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Torrance, CA, US
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last 30 patents
Information
Patent Grant
Coded communication system and method for controlling an electric lamp
Patent number
5,872,429
Issue date
Feb 16, 1999
Philips Electronics North America Corporation
Yongping Xia
H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information
Patent Grant
EBL having a feedback circuit and a method for ensuring low tempera...
Patent number
5,850,127
Issue date
Dec 15, 1998
Philips Electronics North America Corporation
Joshua Zhu
H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information
Patent Grant
Lamp ballast with lamp rectification detection circuitry
Patent number
5,808,422
Issue date
Sep 15, 1998
Philips Electronics North America
Sreeraman Venkitasubrahmanian
H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information
Patent Grant
Lamp controller with lamp status detection and safety circuitry
Patent number
5,751,115
Issue date
May 12, 1998
Philips Electronics North America Corporation
Raj Jayaraman
H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information
Patent Grant
Electronic ballast with interface circuitry for multiple dimming in...
Patent number
5,691,605
Issue date
Nov 25, 1997
Philips Electronics North America
Yongping Xia
H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information
Patent Grant
Lamp controller with lamp status detection and safety circuitry
Patent number
5,650,694
Issue date
Jul 22, 1997
Philips Electronics North America Corporation
Raj Jayaraman
H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information
Patent Grant
Electronic ballast having a triac dimming filter with preconditione...
Patent number
5,604,411
Issue date
Feb 18, 1997
Philips Electronics North America Corporation
Sreeraman Venkitasubrahmanian
H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information
Patent Grant
Electronic ballast with interface circuitry for phase angle dimming...
Patent number
5,559,395
Issue date
Sep 24, 1996
Philips Electronics North America Corporation
Sreeraman Venkitasubrahmanian
H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information
Patent Grant
Temperature-compensated voltage regulator
Patent number
5,519,313
Issue date
May 21, 1996
North American Philips Corporation
Stephen L. Wong
G05 - CONTROLLING REGULATING
Information
Patent Grant
Ballast stabilization circuitry for eliminating moding or oscillati...
Patent number
5,382,881
Issue date
Jan 17, 1995
North American Philips Corporation
Thomas Farkas
H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information
Patent Grant
Current limited power semiconductor device
Patent number
5,272,392
Issue date
Dec 21, 1993
North American Philips Corporation
Stephen L. Wong
H03 - BASIC ELECTRONIC CIRCUITRY