Ichikawa; Singo
Patent Applications and Registrations
Patent applications and USPTO patent grants for Ichikawa; Singo.The latest application filed is for "dc-to-dc voltage converter".
- Ichikawa; Singo - Tanashi JP
- Ichikawa; Singo - Sayama JP
| Patent | Date |
|---|---|
| DC-to-DC Voltage converter Grant 4,451,743 - Suzuki , et al. May 29, 1 | 1984-05-29 |
| Electronic timepiece Grant 4,282,594 - Ichikawa August 4, 1 | 1981-08-04 |
| Electronic watch module structure Grant 4,272,838 - Kasama , et al. June 9, 1 | 1981-06-09 |
| Electronic timepiece Grant 4,270,193 - Ichikawa * May 26, 1 | 1981-05-26 |
| Electronic wristwatch Grant 4,236,237 - Ichikawa November 25, 1 | 1980-11-25 |
| Solid state watch module construction Grant 4,232,512 - Yoshikawa , et al. November 11, 1 | 1980-11-11 |
| Electronic timepiece Grant 4,226,081 - Ichikawa October 7, 1 | 1980-10-07 |
| Electronic timepiece having a voltage conversion circuit Grant 4,221,111 - Onda , et al. September 9, 1 | 1980-09-09 |
| Function selection circuit for multi-function timepiece Grant 4,216,649 - Ichikawa , et al. August 12, 1 | 1980-08-12 |
| Timepiece with display device for warning battery life Grant 4,175,377 - Ichikawa November 27, 1 | 1979-11-27 |
| Analog quartz timepiece Grant 4,173,863 - Motoki , et al. November 13, 1 | 1979-11-13 |
| Electronic timepiece Grant 4,147,022 - Ichikawa April 3, 1 | 1979-04-03 |
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