Number | Name | Date | Kind |
---|---|---|---|
1424848 | Paddison | Aug 1922 | |
1806422 | Shaen | May 1931 | |
4639547 | Jacob-Grinschgl et al. | Jan 1987 |
Number | Date | Country |
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17185 | Jun 1898 | CHX |
Entry |
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Advertisement of Summagraphics Corporation for the Intelligent Digitizer (Form 380 10K) Series, (Form No. 181, Rev. D. 3/88). |
Advertisement of Summagraphics Corporation for Microgrid II Series, (Form No. 181, Rev. D. 3/88). |
J. Titus; "Digitizing tablets offer choices of formats, operating modes, and pointers", Apr. 1986, pp. 69-72, 74, E. D. N. Electrical Design News, vol. 31, No. 8. |
T. A. Nobbe; "Graphic-input devices for CAD/CAM", Feb. 1985, pp. 106-110, Machine Design, vol. 57, No. 4. |