Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5015905 | DC dynamoelectric machine with interpoles having magnetic flux bypassing members | Haruo Koharagi, Kazuo Tahara, Nobutaka Suzuki | 1991-05-14 |
| 4331897 | Commutator apparatus for rotary electric machine | Tadashi Sonobe, Shinzi Saruwatari, Sueo Kawai, Toshio Hattori | 1982-05-25 |