Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4731723 | Power supply installation for DC electric railroad | Toyomi Gondo, Tuneo Tamura, Hiroyasu Sato | 1988-03-15 |
| 4680663 | Power supply installation for dc electric railroad | Toyomi Gondo | 1987-07-14 |
| 4256934 | Disconnecting switch arrangement | Takao Yasuda | 1981-03-17 |