Issued Patents All Time
Showing 1–22 of 22 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10839155 | Text analysis of morphemes by syntax dependency relationship with determination rules | Osamu Oshima | 2020-11-17 |
| 6731847 | Optical fiber | Takatoshi Kato, Kazuhiro Okamoto, Mitsuomi Hada, Shinjiro Hagihara, Kohei Kobayashi | 2004-05-04 |
| 6614976 | Optical fiber having a large positive dispersion | Takatoshi Kato, Kazuhiro Okamoto, Mitsuomi Hada, Shinjiro Hagihara, Kohei Kobayashi | 2003-09-02 |
| 6337942 | Optical fiber | Takatoshi Kato, Kazuhiro Okamoto, Mitsuomi Hada, Shinjiro Hagihara, Kohei Kobayashi | 2002-01-08 |
| 5597398 | Process for producing glass preform for optical fiber | Shinji Ishikawa, Yoshiki Chigusa, Motonori Nakamura, Yoshinori Makio | 1997-01-28 |
| 5277816 | Process for producing titanium dioxide | — | 1994-01-11 |
| 5061460 | Method for manufacturing titanium oxide | Renpei Sei | 1991-10-29 |
| 4992248 | Method for neutralizing sulfuric acid containing zinc ion | Renpei Sei | 1991-02-12 |
| 4952378 | Method for neutralization treatment of sulfuric acid containing iron ions | Renpei Sei | 1990-08-28 |
| 4789444 | Process for electrolytically producing metals of Ni, Co, Zn, Cu, Mn, and Cr from a solution thereof | Sanji Nishimura, Nobuatsu Watanabe | 1988-12-06 |
| 4741893 | Process for producing fluorides of metals | Sanji Nishimura | 1988-05-03 |
| 4678646 | Crystallizer | Sanji Nishimura, Nobuatsu Watanabe | 1987-07-07 |
| 4670230 | Process for selectively stripping iron ions from an organic solvent | Sanji Nishimura | 1987-06-02 |
| 4497655 | Process for production of high-purity metallic iron | Sanji Nishimura | 1985-02-05 |
| 4478804 | Recovery process of uranium | Sanji Nishimura | 1984-10-23 |
| 4434518 | Sport shoes | — | 1984-03-06 |
| 4434002 | Process for production of high-purity metallic iron | Sanji Nishimura | 1984-02-28 |
| 4397682 | Process for preparing metals from their fluorine-containing compounds | Sanji Nishimura, Nobuatsu Watanabe | 1983-08-09 |
| 4390508 | Process for recovery of aluminum oxide from aluminum compounds containing fluorine | Sanji Nishimura, Nobuatsu Watanabe | 1983-06-28 |
| 4349514 | Process for recovery of reusable chromic acid from the waste chromic acid solution containing impurities | Sanji Nishimura | 1982-09-14 |
| 4335528 | Sport shoes | — | 1982-06-22 |
| 4210502 | Process for recovery of waste H.sub.2 SO.sub.4 and HCl | Sanji Nishimura | 1980-07-01 |