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Referenced by

Citing PatentFiling dateIssue dateOriginal AssigneeTitle
US43833821 Oct 198017 May 1983Self-Powered Lighting Inc.Self-luminous safety sign
US43855864 Sep 198131 May 1983Escape/rescue system
US440105030 Sep 198130 Aug 1983Phosphorescent escape route indicator
US510556829 Apr 199121 Apr 1992Innovative Products Group, Inc.Illuminated sign having stencil panel and reflector panel
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US59640513 Mar 199712 Oct 1999Autronics Plastics, Inc.
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Internally illuminated sign
US602660212 Nov 199722 Feb 2000Prolume, Inc.Apparatus and method of indirectly illuminating a sign
US663157510 Aug 200114 Oct 2003Daktronics, Inc.LED and light diffuser for a lighted sign
US682985227 Mar 200314 Dec 2004Daktronics, Inc.LED lighted sign with a light diffuser
USD30577911 Sep 198630 Jan 1990Marker for emergency evacuation