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| US4245168 | 3. Aug. 1978 | 13. Jan. 1981 | General Electric Company | Integratable driver for liquid crystal displays and the like |
| US4264966 | 29. Juni 1979 | 28. Apr. 1981 | | Balanced digital time displays |
| US4270196 | 6. März 1979 | 26. Mai 1981 | | Balanced complementary digital time displays |
| US4271497 | 13. März 1978 | 2. Juni 1981 | | Quadri-balanced digital time displays |
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| US4302751 | 19. Aug. 1977 | 24. Nov. 1981 | Sharp Kabushiki Kaisha | Driver circuit for electrochromic displays |
| US4483628 | 17. März 1981 | 20. Nov. 1984 | | Balanced chronograph digital time display |
| US4657347 | 12. Aug. 1986 | 14. Apr. 1987 | Tokyo Electric Co., Ltd. | Liquid crystal display with zener diode |
| US4823078 | 16. Nov. 1987 | 18. Apr. 1989 | Raychem Corporation | Device for A.C. voltage testing using a voltage multiplier and LCD display |
| US5977688 | 28. März 1997 | 2. Nov. 1999 | Seiko Instruments R & D Center Inc. | Electronic apparatus for being switched using piezoelectric element |
| US7428191 | 1. Mai 2006 | 23. Sept. 2008 | | Electronic timepiece with inverted digital display |
