Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4814424 | Method of stabilizing polyoxymethylene copolymer | Takeo Suzumori, Isamu Masumoto, Mitsuo Nakagawa | 1989-03-21 |
| 4681927 | Process for producing oxymethylene copolyer | Toshikazu Umemura, Isamu Masumoto | 1987-07-21 |