Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4747763 | Rotor assembly of roots pump | Takuo Sibata, Hisao Shirai, Katsuro Harada, Kichiro Kato, Naofumi Masuda | 1988-05-31 |
| 4425899 | Intake heating device of an internal combustion engine | Keigo Kato | 1984-01-17 |