Number | Name | Date | Kind |
---|---|---|---|
4071689 | Talmage et al. | Jan 1978 | |
4121049 | Roeber | Oct 1978 | |
4214122 | Kley | Jul 1980 | |
4293734 | Pepper, Jr. | Oct 1981 | |
4448837 | Ikeda et al. | May 1984 | |
4449774 | Takashi et al. | May 1984 |
Entry |
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U.S. patent application Ser. No. 682,780, filed Dec. 18, 1984, J. Federico et al. |
U.S. patent application Ser. No. 728,813, filed Apr. 30, 1985, S. Jin et al. |
Displays, "Graphic Tablets--a Review", D. J. Grover, Jul 1979, pp. 83-93. |