U.S. patent number D277,630 [Application Number 06/428,126] was granted by the patent office on 1985-02-19 for stereo headrest for dental chairs. Invention is credited to Steven T. Matthews, David V. Olson.
United States Patent | D277,630 |
Olson , et al. | February 19, 1985 |
Inventors: | Olson; David V. (Minneapolis, MN), Matthews; Steven T. (Bloomington, MN) |
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Appl. No.: | 06/428,126 |
Filed: | September 29, 1982 |
Current U.S. Class: | D6/716.5; D6/601 |
Field of Search: | ;D6/22,37,39 ;179/146H ;297/391,396 |
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