Lens array for passive infrared motion detector systems or the like
Description
The single FIGURE is a front elevational view of a lens array for passive infrared motion detector systems or the like showing our new design, the lens array being a flat, rectangular, thin sheet having a plain, smooth, rear surface with no ornamentation.
Referenced Cited
U.S. Patent Documents
Foreign Patent Documents
| 1970358 | August 1934 | Bull et al. |
| 3463118 | August 1969 | Wood |
| 3708222 | January 1973 | Stern |
| 3883733 | May 1975 | Nagel |
| 968412 | February 1958 | DEX |
| 2173013A | October 1986 | GBX |
Patent History
Patent number: D315422
Type: Grant
Filed: Oct 11, 1988
Date of Patent: Mar 12, 1991
Assignee: Fresnel Technologies, Inc. (Fort Worth, TX)
Inventors: Ricahrd N. Claytor (Arlington, TX), Truman D. Black (Arlington, TX)
Primary Examiner: Susan J. Lucas
Attorney: James E. Bradley
Application Number: 7/256,366
Type: Grant
Filed: Oct 11, 1988
Date of Patent: Mar 12, 1991
Assignee: Fresnel Technologies, Inc. (Fort Worth, TX)
Inventors: Ricahrd N. Claytor (Arlington, TX), Truman D. Black (Arlington, TX)
Primary Examiner: Susan J. Lucas
Attorney: James E. Bradley
Application Number: 7/256,366
Classifications
