Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11496082 | Synchronous motor drive system and synchronous motor drive method | — | 2022-11-08 |
| 11056995 | Synchronous motor drive system and synchronous motor drive method | — | 2021-07-06 |
| 7456600 | Pulse code width modulation motor drive system | — | 2008-11-25 |
| 5420778 | Independent real time control of output frequency and voltage of PWM inverter | — | 1995-05-30 |
| 4634952 | Inverter | Mitsuo Koshi, Osamu Sumiyoshi | 1987-01-06 |
| 4593881 | Electronic expansion valve | — | 1986-06-10 |
| 4507936 | Integral solar and heat pump water heating system | — | 1985-04-02 |
| 4481788 | Water heating system | — | 1984-11-13 |
| 4420947 | Heat pump air conditioning system | — | 1983-12-20 |