Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6540482 | Turbo-type machines | Kouichi Irie, Tomoyoshi Okamura, Junichi Kurokawa | 2003-04-01 |
| 6527509 | Turbo machines | Junichi Kurokawa, Hitoharu Kimura, Tomoyshi Okamura, Takahide Nagahara, Akira Manabe +1 more | 2003-03-04 |
| 6302643 | Turbo machines | Junichi Kurokawa, Hitoharu Kimura, Tomoyoshi Okamura, Takahide Nagahara, Akira Manabe +1 more | 2001-10-16 |
| 6102618 | Large-depth underground drainage facility and method of running same | Kunio Takada, Kenji Otani, Masayuki Yamada, Saburo Maru, Sadashi Tanaka | 2000-08-15 |
| 5909982 | Large-depth underground drainage facility and method of running same | Kunio Takada, Kenji Otani, Masayuki Yamada, Saburo Maru, Sadashi Tanaka | 1999-06-08 |
| 5733065 | Underground drainage facility, vertical-shaft multi-stage adjustable vane pump, and method of running drainage pump | Masayuki Yamada, Saburo Maru | 1998-03-31 |
| 5634740 | Large-depth underground drainage facility and method of running same | Kunio Takada, Kenji Otani, Masayuki Yamada, Saburo Maru, Sadashi Tanaka | 1997-06-03 |
| 5624226 | Underground drainage facility, vertical-shaft multi-stage adjustable vane pump, and method of running drainage pump | Masayuki Yamada, Saburo Maru | 1997-04-29 |
| 5487621 | Large-depth underground drainage facility and method of running same | Kunio Takada, Kenji Otani, Masayuki Yamada, Saburo Maru, Sadashi Tanaka | 1996-01-30 |
| 5360290 | Underground drainage facility, vertical-shaft multi-stage adjustable vane pump, and method of running drainage pump | Masayuki Yamada, Saburo Maru | 1994-11-01 |
| 5154570 | Vertical shaft pump | Yoshihiko Yoshikawa, Shizuichi Sakamoto | 1992-10-13 |
| 4362463 | Movable blade pump | Hiromichi Anan, Masayuki Yamada | 1982-12-07 |