Number | Name | Date | Kind |
---|---|---|---|
4341934 | Muller | Jul 1982 | |
4529849 | Kamei et al. | Jul 1985 |
Number | Date | Country |
---|---|---|
1046223 | Jul 1963 | GBX |
2029105 | Mar 1980 | GBX |
Entry |
---|
"Spring and Magnet Keyboard Actuator" by K. A. Lennon, IBM Technical Disclosure Bulletin, vol. 24, No. 8, Jan. 1982, pp. 4314-4315. |
"Push Button Switch" by G. L. Spahn of Western Electric, Technical Digest, No. 53, Jan. 1979, pp. 23-24. |
"Braille Readout Pocket Calculator" by R. A. Bartels, IBM Technical Bulletin, vol. 17, No. 8, Jan. 1975, pp. 2471-2472. |
"Magnetic Snap-Acturation Keyboards" by Bolda et al, IBM Technical Bulletin, vol. 26, No. 6, Nov. 1983. |