Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4544829 | Electric soldering iron having a PTC heating element | Sho Kotani | 1985-10-01 |
| 4468555 | Electric soldering iron having a PTC heating element | Sho Kotani | 1984-08-28 |
| 4183829 | Catalysts for purification of exhaust gases from internal combustion engines | Suguru Takayama, Takuo Sato | 1980-01-15 |