Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9169192 | Hydrogenation catalyst, process for its production and its use | Shou Kawabe | 2015-10-27 |
| 5739023 | Stabilized neutral metalloprotease composition, a method of making the composition, and a method of transporting the composition | Yukio Kunisawa, Kiyotaka Oyama, Johanna Christina Maria Smeets, Shuya Takasuga, Wilhelmus J. J. Van Den Tweel | 1998-04-14 |
| 5693485 | Enzymatic coupling reaction of N-protected-L-aspartic acid and phenylalanine methyl ester | Shigeaki Irino, Yukio Kunisawa, Kiyotaka Oyama | 1997-12-02 |
| 5347035 | Method for crystallizing .alpha.-L-aspartyl-L-phenylalanine methyl ester | Hidetoshi Wakamatsu, Yukio Kunisawa, Kiyotaka Oyama | 1994-09-13 |
| 4944852 | Method for purifying a dipeptide ester | Yasuhiro Kurauchi, Michihiro Akazawa, Kiyotaka Oyama, Akira Tokuda | 1990-07-31 |
| 4835303 | Process for producing dry .alpha.-L-aspartyl-L-phenylalanine methyl ester | Hideotoshi Wakamatsu, Shigeaki Irino, Akira Tokuda, Kiyotaka Oyama | 1989-05-30 |
| 4835301 | Process for producing stable .alpha.-L-aspartyl-L-phenylalanine methyl ester | Hidetoshi Wakamatsu, Shigeaki Irino, Akira Tokuda, Kiyotaka Oyama | 1989-05-30 |
| 4831180 | Process for producing alpha-L-aspartyl-L-phenylalanine methyl ester having an improved solubility | Hidetoshi Wakamatsu, Shigeaki Irino, Akira Tokuda, Hiyotaka Oyama | 1989-05-16 |
| 4830720 | Method for purifying a dipeptide ester | Ken Fukuda, Hiroshi Shimizu, Akira Tokuda, Kiyotaka Oyama | 1989-05-16 |
| 4810818 | Process for producing alpha-aspartyl-l-phenylalanine methyl ester having an improved solubility | Hidetoshi Wakamatsu, Shigeaki Irino, Akira Tokuda, Kiyotaka Oyama | 1989-03-07 |
| 4769486 | Method for racemizing an optically active amino acid | Kiyotaka Oyama | 1988-09-06 |
| 4560615 | Alkali-proof cast aluminum product having a wear-resistant surface layer | Yu Saito | 1985-12-24 |
| 4521514 | Process for producing an addition compound of a dipeptide ester and an amino acid ester | Kiyotaka Oyama, Shigeaki Irino, Masao Nakamura | 1985-06-04 |
| 4506011 | Process for preparation of aspartylphenylalanine alkyl esters | Hisao Takemoto, Tatsuo Igarashi | 1985-03-19 |
| 4321459 | Electrical heating molded-element comprising inorganic fibers | Yoshihisa Miyahara, Kimimasa Kobayashi, Yawara Kobayashi | 1982-03-23 |