Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10138149 | Ultrapure water production system, ultrapure water production feed system, and method for cleaning thereof | Ikunori Yokoi, Yoichi Tanaka | 2018-11-27 |
| 8846773 | Method for manufacturing anion exchange resin, anion exchange resin, method for manufacturing cation exchange resin, cation exchange resin, mixed bed resin, and method for manufacturing ultrapure water for washing electronic component material | Tetsuo Mizuniwa, Kazuhiko Tokunaga, Masako Yasutomi | 2014-09-30 |
| 8765825 | Method for manufacturing anion exchange resin, anion exchange resin, method for manufacturing cation exchange resin, cation exchange resin, mixed bed resin, and method for manufacturing ultrapure water for washing electronic component material | Tetsuo Mizuniwa, Kazuhiko Tokunaga, Masako Yasutomi | 2014-07-01 |
| 8476324 | Method for manufacturing anion exchange resin, anion exchange resin, method for manufacturing cation exchange resin, cation exchange resin, mixed bed resin, and method for manufacturing ultrapure water for washing electronic component material | Tetsuo Mizuniwa, Kazuhiko Tokunaga, Masako Yasutomi | 2013-07-02 |
| 8012755 | Water quality evaluation method and substrate contacting apparatus used | Ikunori Yokoi, Tetsuo Mizuniwa | 2011-09-06 |
| 4502434 | Internal combustion engine | Shoichiro Irimajiri | 1985-03-05 |
| 4383508 | Internal combustion engine | Shoichiro Irimajiri | 1983-05-17 |
| 4266787 | Piston ring | — | 1981-05-12 |
| 4256067 | Oblong piston rings for internal combustion engine | — | 1981-03-17 |
| 4256068 | Oblong piston and cylinder for internal combustion engine | Shoichiro Irimajiri | 1981-03-17 |
| 4198065 | Piston ring for internal combustion engine | — | 1980-04-15 |