|
| US4129758 | 10 juin 1977 | 12 déc. 1978 | Telaris Telecommunications, Inc. | Keyboard switch assembly having flexible contact carrying member between contact carrying substrate and flexible, resilient, key-depressible bubble protrusions |
| US4251697 | 8 janv. 1979 | 17 févr. 1981 | Amper, S.A. | Keypad for telephones |
| US4341934 | 21 nov. 1980 | 27 juil. 1982 | The Keyboard Company | Actuator for keyboard switches |
| US4376239 | 30 avr. 1982 | 8 mars 1983 | Allen-Bradley Company | Industrial membrane switch |
| US4392037 | 4 juin 1981 | 5 juil. 1983 | Burroughs Corporation | Stabilized button for an electrical keyboard |
| US4418257 | 23 nov. 1981 | 29 nov. 1983 | The Keyboard Company | Keyboard switch |
| US4439646 | 20 avr. 1982 | 27 mars 1984 | Societe de Telecommunications Electronique Aeronautique et Maritime T.E.A.M. | Keyboard switch assembly |
| US4440992 | 28 juin 1983 | 3 avr. 1984 | AMP Incorporated | Low profile keyboard switch actuating assembly |
| US4440999 | 13 août 1982 | 3 avr. 1984 | Press On, Inc. | Membrane switch |
| US4453198 | 15 sept. 1982 | 5 juin 1984 | General Instrument Corporation | Linear feel keyswitch with hysteresis |
| US4454562 | 15 sept. 1982 | 12 juin 1984 | General Instrument Corporation | Keyswitch with telescoping plunger |
| US4471177 | 13 août 1982 | 11 sept. 1984 | Press On, Inc. | Enlarged switch area membrane switch and method |
| US4496803 | 4 mai 1983 | 29 janv. 1985 | Key Concepts, Incorporated | Data entry switch |
| US4515999 | 24 janv. 1983 | 7 mai 1985 | Rogers Corporation | Full travel keyboard |
| US4678880 | 17 avr. 1985 | 7 juil. 1987 | Omron Tateisi Electronics Co. | Keyboard switch |
| US5120923 | 18 sept. 1990 | 9 juin 1992 | | Push button switch |
| USD305422 | 22 oct. 1986 | 9 janv. 1990 | Plessey Overseas Limited | Three keypad pushbutton set for telecommunications instruments |
