U.S. patent number D335,539 [Application Number 07/645,009] was granted by the patent office on 1993-05-11 for casting machine for dental prostheses. This patent grant is currently assigned to Denken Co., Ltd., Olympus Optical Company, Ltd.. Invention is credited to Mamoru Aihara, Yasuharu Hakamatsuka, Toshio Shimizu, Manabu Takahashi, Kazuhiro Watanabe.
United States Patent | D335,539 |
Hakamatsuka , et al. | May 11, 1993 |
Inventors: | Hakamatsuka; Yasuharu (Tokyo, JP), Watanabe; Kazuhiro (Tokyo, JP), Aihara; Mamoru (Tokyo, JP), Takahashi; Manabu (Tokyo, JP), Shimizu; Toshio (Kyoto, JP) |
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Assignee: | Olympus Optical Company, Ltd.
(Tokyo, JP) Denken Co., Ltd. (Kyoto, JP) |
Appl. No.: | 07/645,009 |
Filed: | January 23, 1991 |
Jul 31, 1990 [JP] | 2-25941 | |||
Current U.S. Class: | D24/176 |
Field of Search: | ;D24/176-177,179,184-185,216,217 ;433/25,32,49,27,229 ;164/253,259,150,290,335,286-287 ;425/143-144,425,435 |
2509670 | May 1950 | Capita et al. |
3234604 | February 1966 | Anderson |
4478567 | October 1984 | Schaer |
4630666 | December 1986 | Wismann |
4729780 | March 1988 | Shimizu |
4998872 | March 1991 | Funakubo et al. |
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