Issued Patents All Time
Showing 1–25 of 34 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4785297 | Driver circuit for matrix type display device | — | 1988-11-15 |
| 4746915 | Drive circuit for matrix display device | — | 1988-05-24 |
| 4645303 | Liquid crystal matrix display panel drive method | Hiroshi Shimizu | 1987-02-24 |
| 4633242 | Row conductor scanning drive circuit for matrix display panel | — | 1986-12-30 |
| 4475180 | Non-volatile memory circuit for portable electronic devices | Itsunari Hayabuchi | 1984-10-02 |
| 4433920 | Electronic timepiece having improved primary frequency divider response characteristics | Shigeru Morokawa, Ryoji Iwakura | 1984-02-28 |
| 4433918 | Analog display electronic timepiece with multi-mode display capability | Katsuo Nishimura | 1984-02-28 |
| 4308607 | Electronic timepiece | Minoru Watanabe | 1981-12-29 |
| 4306302 | Electronic timepiece | Minoru Watanabe | 1981-12-15 |
| 4302829 | Electronic timepiece | Shigeru Morokawa, Yukio Hashimoto, Yasushi Nomura, Keiichiro Koga | 1981-11-24 |
| 4302828 | Electronic timepiece | Shigeru Morokawa, Yukio Hashimoto, Yasushi Nomura, Keiichiro Koga | 1981-11-24 |
| 4292680 | Electronic timepiece | Shigeru Morokawa, Yukio Hashimoto, Yasushi Nomura, Keiichiro Koga | 1981-09-29 |
| 4277840 | Electronic timepiece | Takashi Yamada | 1981-07-07 |
| 4270194 | Electronic alarm timepiece | Shigeru Morokawa, Yukio Hashimoto, Yasushi Nomura, Keiichiro Koga | 1981-05-26 |
| 4266278 | Portable electronic device equipped with calculation and timekeeping functions | Heihachiro Ebihara, Takashi Yamada | 1981-05-05 |
| 4262349 | System for signalling the termination of the lifetime of a battery for electronic timepieces | Takashi Yamada, Kazunari Kume | 1981-04-14 |
| 4262351 | Electronic timepiece | Shigeru Morokawa, Yukio Hashimoto, Yasushi Nomura, Keiichiro Koga | 1981-04-14 |
| 4258431 | Electronic timepiece having an analog display device and a digital display device | Takashi Yamada | 1981-03-24 |
| 4257114 | Electronic timepiece | Yuzo Maekawa | 1981-03-17 |
| 4250571 | Portable electronic device | Heihachiro Ebihara, Takashi Yamada | 1981-02-10 |
| 4246602 | Electronic timepiece | Takashi Yamada | 1981-01-20 |
| 4245338 | Time correction system for an electronic timepiece | Takashi Yamada | 1981-01-13 |
| 4244043 | Frequency division system | Hiro Fujita, Akira Tsuzuki, Heihachiro Ebiha | 1981-01-06 |
| 4240150 | Portable timepiece calculator with power savings feature | Heihachiro Ebihara, Takashi Yamada | 1980-12-16 |
| 4237420 | Temperature sensing circuit | Heihachiro Ebihara, Misao Uchino | 1980-12-02 |