Issued Patents All Time
Showing 1–22 of 22 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11556101 | Appliance management system | — | 2023-01-17 |
| 4879754 | Speed controller | Kunihira Tadashi | 1989-11-07 |
| 4636696 | Servo system | Tadashi Kunihira, Yoshiaki Igarashi | 1987-01-13 |
| 4633150 | Driving circuit for brushless DC motors | Toshio Inaji, Yoshiaki Igarashi | 1986-12-30 |
| 4587665 | Binary counter having buffer and coincidence circuits for the switched bistable stages thereof | — | 1986-05-06 |
| 4559488 | Integrated precision reference source | — | 1985-12-17 |
| 4509182 | Binary counter | — | 1985-04-02 |
| 4473819 | Digital-to-analog conversion apparatus with a variable active-level | — | 1984-09-25 |
| 4379238 | Integrated signal processing circuit | — | 1983-04-05 |
| 4331926 | Programmable frequency divider | — | 1982-05-25 |
| 4318012 | Input signal processing circuit formed as an integrated circuit | — | 1982-03-02 |
| 4301422 | Frequency synthesizer | — | 1981-11-17 |
| 4296380 | Programmable digital frequency divider for synthesizing signals at desired frequency | — | 1981-10-20 |
| 4296407 | Digital frequency synthesizer with frequency divider programmable in response to stored digital control signal | — | 1981-10-20 |
| 4278925 | Phase-locked loop speed control system using programmable counter for frequency pulling | — | 1981-07-14 |
| 4277754 | Digital frequency-phase comparator | — | 1981-07-07 |
| 4242618 | Speed controller for rotary machine | — | 1980-12-30 |
| 4207539 | Frequency synthesizer | — | 1980-06-10 |
| 4203061 | Rotational speed indicating apparatus | — | 1980-05-13 |
| 4191927 | Mixing circuit for digital signals | — | 1980-03-04 |
| 4189666 | Speed control system for small size D-C electric motor | Yoshio Tetsugu, Hiromitsu Nakano, Tomio Oyama, Isao Yoshida, Mitsuharu Ota +1 more | 1980-02-19 |
| 4184114 | Arrangement for indicating revolutional speed of a revolving body | — | 1980-01-15 |