Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11668401 | Dual gate valve | Hiroshi Ogawa, Takashi Nagao | 2023-06-06 |
| 11255464 | Low noise gate valve | Hiroshi Ogawa, Hiroshi Udagawa, Takashi Nagao | 2022-02-22 |
| 11174950 | Mounting structure for mounting valve plate to valve rod in gate valve, and gate valve having mounting structure | Hiroshi Ogawa, Takashi Nagao, Tsuyoshi Ochi | 2021-11-16 |
| 10876639 | Mounting structure of valve plate with respect to valve rod | Takashi Nagao, Tsuyoshi Ochi, Hiroshi Ogawa | 2020-12-29 |
| 10539240 | Gate-valve attaching structure | Hiroshi Ogawa | 2020-01-21 |
| 10253889 | Gate valve | Tsuneo Ishigaki, Takashi Nagao | 2019-04-09 |
| 9599233 | Gate valve | Tsuneo Ishigaki, Takashi Nagao | 2017-03-21 |
| 9482350 | Radical-resistant gate valve | Tsuneo Ishigaki, Hiroshi Ogawa | 2016-11-01 |
| 9404589 | Non-sliding gate valve | Tsuneo Ishigaki, Hiroshi Ogawa | 2016-08-02 |
| 8800956 | Non-sliding gate valve | Tsuneo Ishigaki, Hiroshi Ogawa | 2014-08-12 |
| 8657257 | Gate valve | Hiroshi Ogawa | 2014-02-25 |
| 8534311 | Vacuum valve | Tsuneo Ishigaki, Hiroshi Ogawa | 2013-09-17 |
| 8382066 | Gate valve | Takashi Nagao, Hiroshi Ogawa | 2013-02-26 |
| 5701602 | Frequency control apparatus for base station in satellite communication system | — | 1997-12-23 |
| 5348568 | Filtering method of flue gas of a boiler and a filter apparatus for hot gas | Noriyuki Oda, Hiroshi Maeno, Katsumi Higashi, Akira Toriyama | 1994-09-20 |
| 4934282 | Circulating type fluidized bed combustion apparatus | Minoru Asai, Yukio Oda, Kiyoshi Aoki, Keiji Makino | 1990-06-19 |
| 4699587 | Burner | Hajime Saito | 1987-10-13 |
| 4656972 | Method and apparatus for reducing NO.sub.x in exhaust gases from fluidized-bed boiler | — | 1987-04-14 |
| 4619314 | Device for preventing wear of heat transfer tubes in fluidized-bed boiler | — | 1986-10-28 |