|
| US4023151 | 24 Nov 1975 | 10 May 1977 | | Communication appliance operating device |
| US4185192 | 27 Mar 1978 | 22 Jan 1980 | Frank E. Maddocks, III
Dennis E. Belli | Alignment system using two photocells directed at each other |
| US4272762 | 17 Sep 1979 | 9 Jun 1981 | GTE Laboratories Incorporated | Exit-entry sensing apparatus |
| US4403142 | 14 May 1981 | 6 Sep 1983 | Matsushita Electric Works, Ltd. | Moving object detecting apparatus |
| US4556875 | 24 Nov 1982 | 3 Dec 1985 | Matsushita Electric Industrial Co., Ltd. | Irradiated power monitoring system for optical fiber |
| US4670798 | 14 Apr 1986 | 2 Jun 1987 | Max L. Campbell | Point of purchase advertising system |
| US4951045 | 29 Mar 1989 | 21 Aug 1990 | Intelligent Safety Technology, Inc. | Portable electronic warning device for temporary conditions |
| US4984098 | 1 Aug 1986 | 8 Jan 1991 | Popad, Inc. | Point of purchase automatically-actuated audio advertising device and method |
| US5227762 | 26 Oct 1990 | 13 Jul 1993 | Thomas Industries Inc. | Power line carrier controlled lighting system |
| US5475360 | 19 Aug 1994 | 12 Dec 1995 | Thomas Industries, Inc. | Power line carrier controlled lighting system |
| USD558381 | 28 Feb 2007 | 25 Dec 2007 | Genlyte Thomas Group, LLC | Luminaire |
