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
Robert McAfee, Marnie E Rycroft, Morteza Showleh: Emergency lighting system with a DC sensing load relay. Lumacell, Pepe & Hazard, January 12, 1999: US05859499 (12 worldwide citation)

An emergency lighting system has emergency light units operable by DC power and connected to a source of AC and DC power by the same conduit system. Power to the conduit system may be switched from AC to DC in the event of a power failure and a load relay module in the conduit system adjacent the li ...