Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6310242 | Process for preparing D-alloisoleucine and intermediates for preparation | Hirofumi Noda, Koji Ohsaka, Kenichi Sakai | 2001-10-30 |
| 5792869 | Process for preparing optically active piperazine derivatives and Intermediates for preparation | Shoko Satoh, Tadashi Tobiyama, Ken'ichi Sakai, Hiroyuki Nohira | 1998-08-11 |
| 4407892 | Heat sensitive recording sheet | Akihiro Yamaguchi, Keizaburo Yamaguchi | 1983-10-04 |
| 4400492 | Color-developer for pressure-sensitive recording sheets | Makoto Asano, Saburo Kawashima, Yoshimitu Tanabe | 1983-08-23 |
| 4380671 | Process for the preparation of 2,2'-bis(4-substituted phenol)sulfides | Akihiro Yamaguchi, Tadashi Kobayashi, Keizaburo Yamaguchi | 1983-04-19 |
| 4379897 | Color-developer for pressure-sensitive sheets | Makoto Asano, Yoshimitu Tanabe | 1983-04-12 |
| 4342700 | Oxidation-reduction reagents for a wet desulfurization process and a process for preparing same | Katsuya Sakai, Ryuichi Mita, Toshio Kato, Chojiro Higuchi | 1982-08-03 |
| 4338259 | Alpha-halogeno-beta-aminopropionitriles or the mineral acid salts thereof, and processes for production thereof | Ryuichi Mita, Akihiro Yamaguchi, Toshio Kato, Chojiro Higuchi | 1982-07-06 |
| 4312522 | Heat sensitive recording sheet | Akihiro Yamaguchi, Keizaburo Yamaguchi | 1982-01-26 |
| 4287366 | Process for preparing bisphenol sulfone derivatives | Akihiro Yamaguchi, Keizaburo Yamaguchi, Tadashi Kobayashi | 1981-09-01 |
| 4276187 | Oxidation-reduction reagents for a wet desulfurization process and a process for preparing same | Katsuya Sakai, Ryuichi Mita, Toshio Kato, Chojiro Higuchi | 1981-06-30 |
| 4275240 | Process for the preparation of 2,2'-bisphenol sulfoxides | Akihiro Yamaguchi, Keizaburo Yamaguchi, Tadashi Kobayashi | 1981-06-23 |
| 4262938 | Color-developing sheet for pressure-sensitive recording sheets | Akihiro Yamaguchi, Tadashi Kobayashi, Kenzaburo Yamuguchi, Noboru Yamato, Akira Hasegawa | 1981-04-21 |
| 4260179 | Color-developing sheet for pressure-sensitive recording sheets | Akihiro Yamaguchi, Tadashi Kobayashi, Keizaburo Yamaguchi, Kisuke Osawa, Noboru Yamato +1 more | 1981-04-07 |
| 4248804 | Process for the preparation of 2,2'-bis[4-(1,1,3,3-tetramethylbutyl)phenol]sulfide | Akihiro Yamaguchi, Tadashi Kobayashi, Keisaburo Yamaguchi | 1981-02-03 |