U.S. patent number D328,442 [Application Number 07/471,811] was granted by the patent office on 1992-08-04 for obstacle marker. Invention is credited to Elliott Sloan.
United States Patent | D328,442 |
Sloan | August 4, 1992 |
Inventors: | Sloan; Elliott (Marblehead, MA) |
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Appl. No.: | 07/471,811 |
Filed: | January 29, 1990 |
Current U.S. Class: | D10/109.1; D10/111 |
Field of Search: | ;D10/109,110,111,113,114,115 ;116/63R,63P,284,286 ;362/226,367,431 ;359/552 |
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