U.S. patent number D302,336 [Application Number 06/918,798] was granted by the patent office on 1989-07-18 for combined lighter and calculator for determining the number of cigarettes smoked. Invention is credited to Errol D. Erickson.
United States Patent | D302,336 |
Erickson | July 18, 1989 |
Inventors: | Erickson; Errol D. (Wahpeton, ND) |
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Appl. No.: | 06/918,798 |
Filed: | October 14, 1986 |
Current U.S. Class: | D27/145; D18/7; D18/2 |
Field of Search: | ;D27/102,103,105,106,111,129,131,132,135,140,141,143,144,145,173,175,177,178,185 ;D9/432 ;D18/2,7 ;364/708 ;431/253 ;D14/100 |
D249093 | August 1978 | Hazama et al. |
D251330 | March 1979 | Kurosu et al. |
D256694 | September 1980 | Kitai |
4090247 | May 1978 | Martin |
4189912 | February 1980 | Washizuka et al. |
4311448 | January 1982 | Strauss |
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