1
Abolfazl Madadi, Morteza Showleh, David J Rycroft: LED lamp. Lumacell, Pepe & Hazard, November 18, 1997: US05688042 (389 worldwide citation)

A LED lamp for use in lighted sign assemblies has a base configured to engage an associated electrical socket, a light array extending from the base, the base has conductive elements on the outer surface thereof to effect a power connection to the socket and internal contacts coupled thereto. The li ...


2
David J Rycroft, Abi F Madadi: Exit signs with LED illumination. Kaufel Group, November 15, 1994: US05365411 (142 worldwide citation)

A light unit for use in lighted sign assemblies has a housing with a rear wall, upstanding opposed side walls, and shield elements extending inwardly from adjacent the upper ends of the side walls. Light arrays extending along the side walls have light emitting diodes disposed in spaced relationship ...