Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5679849 | Method of producing a bis(2-carboxyethyl)alkyl phosphine oxide and a derivative thereof | Tsutomu Watanabe, Kaoru Takeuchi | 1997-10-21 |
| 5663419 | Bifunctional alkyl phosphine oxide and production method thereof | Tsutomu Watanabe, Seiji Shimura | 1997-09-02 |