Issued Patents All Time
Showing 25 most recent of 26 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7755267 | Electron emitting device having electroconductive thin film and high resistivity sheet | — | 2010-07-13 |
| 7482742 | Electron source substrate with high-impedance portion, and image-forming apparatus | Kazuhiro Sando | 2009-01-27 |
| 6132136 | Drainage water pumping station and method for operating the same | Kenji Otani, Sadashi Tanaka | 2000-10-17 |
| 6102618 | Large-depth underground drainage facility and method of running same | Kenji Otani, Masayuki Yamada, Saburo Maru, Sumio Sudo, Sadashi Tanaka | 2000-08-15 |
| 6007878 | Process for producing an optical recording medium having a protective layer formed using a plasma processing device | Nobumasa Suzuki, Toshimori Miyakoshi | 1999-12-28 |
| 5909982 | Large-depth underground drainage facility and method of running same | Kenji Otani, Masayuki Yamada, Saburo Maru, Sumio Sudo, Sadashi Tanaka | 1999-06-08 |
| 5839880 | Bearing unit, drainage pump and hydraulic turbine each incorporating the bearing unit, and method of manufacturing the bearing unit | Ryoji Okada, Kooji Aizawa, Masayuki Yamada, Kenji Otani, Mitsuaki Haneda +1 more | 1998-11-24 |
| 5812421 | System for cooperatively operating river management facilities | Kenji Fujii, Koichi Homma, Fuminobu Komura | 1998-09-22 |
| 5752785 | Drainage pump station and drainage operation method for drainage pump station | Sadashi Tanaka, Seiji Miura, Masayuki Yamada, Yutaka Shimada, Akira Manabe | 1998-05-19 |
| 5733064 | Drainage water pumping station and method for operating the same | Kenji Otani, Sadashi Tanaka | 1998-03-31 |
| 5668531 | Synchronized alarm holding system | Kiyoshi Sukegawa | 1997-09-16 |
| 5639165 | Method of operating pump and bearing device for pump | Kohji Aizawa, Akira Yamaguchi, Shigenobu Nagasawa, Shiro Matsui, Yoshiaki Chiba | 1997-06-17 |
| 5634740 | Large-depth underground drainage facility and method of running same | Kenji Otani, Masayuki Yamada, Saburo Maru, Sumio Sudo, Sadashi Tanaka | 1997-06-03 |
| 5603587 | Drainage water pumping station and method for operating the same | Kenji Otani, Sadashi Tanaka | 1997-02-18 |
| 5589244 | Magneto-optical disc | — | 1996-12-31 |
| 5525379 | Method for manufacturing an optical recording medium | Kazuoki Hongu, Akio Koganei, Toshimori Miyakoshi, Toshio Adachi | 1996-06-11 |
| 5498105 | Drainage water pumping station and method for operating the same | Kenji Otani, Sadashi Tanaka | 1996-03-12 |
| 5487621 | Large-depth underground drainage facility and method of running same | Kenji Otani, Masayuki Yamada, Saburo Maru, Sumio Sudo, Sadashi Tanaka | 1996-01-30 |
| 5458460 | Drainage pump and a hydraulic turbine incorporating a bearing member, and a method of manufacturing the bearing member | Ryoji Okada, Kooji Aizawa, Masayuki Yamada, Kenji Otani, Mitsuaki Haneda +1 more | 1995-10-17 |
| 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 |
| 5160216 | Drainage distribution amount determining method and drainage system | Kenji Otani, Akira Manabe | 1992-11-03 |
| 4892692 | Process for producing substrate for optical disk by annealing substrate with gradient double refraction distribution | Teruaki Okuda | 1990-01-09 |