05463280 is referenced by 442 patents and cites 11 patents.

A retrofittable lamp using light emitting diodes as the illumination source, the lamp is fitted with any one of the common lamp bases and is intended as a retrofit for incandescent lamps having such bases in illuminated signs such as exit signs and the like. The invention contemplates the packaging of a number of light emitting diodes in a circuit usually having a current limiting device to allow LED operation at a desired current level. The light emitting diodes are placed within a standard glass or plastic bulb envelope in arrangements capable of providing even illumination from the lamp.

Title
Light emitting diode retrofit lamp
Application Number
8/206594
Publication Number
5463280
Application Date
March 3, 1994
Publication Date
October 31, 1995
Inventor
James C Johnson
Conyers
GA, US
Agent
Kenneth E Darnell
Assignee
National Service
GA, US
IPC
H05B 37/02
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