Issued Patents 1994
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5360289 | Drainage water pumping station and method for operating the same | Kenji Otani, Sadashi Tanaka | 1994-11-01 |
| 5346316 | Bearing unit, drainage pump and hydraulic turbine each incorporating the bearing unit | Ryoji Okada, Kooju Aizawa, Masayuki Yamada, Kenji Otani, Mitsuaki Haneda +1 more | 1994-09-13 |
| 5330693 | Process and apparatus for injection-molding product having minute surface pattern and central hole | — | 1994-07-19 |
| 5297927 | Vertical shaft type pump | Kooji Aizawa, Katsutoshi Nii, Ryoji Okada, Masayuki Yamada | 1994-03-29 |