U.S. patent number D320,787 [Application Number 07/309,545] was granted by the patent office on 1991-10-15 for digitizing stylus. This patent grant is currently assigned to Summagraphics Corporation. Invention is credited to Charles Merritt, William Valls.
United States Patent | D320,787 |
Valls , et al. | October 15, 1991 |
Inventors: | Valls; William (Harwinton, CT), Merritt; Charles (Southport, CT) |
---|---|
Assignee: | Summagraphics Corporation
(Seymour, CT) |
Appl. No.: | 07/309,545 |
Filed: | February 13, 1989 |
Current U.S. Class: | D14/411; D19/180 |
Field of Search: | ;D14/114,116 ;D19/35,36,41-51,54-58 ;178/18,19 ;340/706,707,710 ;364/708,709 |
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D312659 | December 1990 | Oka |
4184044 | January 1980 | Zwerenz |
4268730 | May 1981 | Higgins et al. |
4532376 | July 1985 | Rockwell |
4667182 | May 1987 | Murphy |
4707571 | November 1987 | Clements et al. |
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