Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6451757 | Chelating agent and detergent comprising the same | Hiroshi Yamamoto, Yasuyuki Takayanagi, Kiyobumi Takahashi | 2002-09-17 |
| 6426229 | Chelating agent and detergent comprising the same | Hiroshi Yamamoto, Yasuyuki Takayanagi, Kiyobumi Takahashi | 2002-07-30 |
| 6221834 | Chelating agent and detergent comprising the same | Hiroshi Yamamoto, Yasuyuki Takayanagi, Kiyobumi Takahashi | 2001-04-24 |
| 5543566 | Process for preparing amino-polycarboxylic acids or salts thereof | Kiyobumi Takahashi | 1996-08-06 |