Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5022990 | Polyvinylidene fluoride porous membrane and a method for producing the same | Yoshinao Doi | 1991-06-11 |
| 4508893 | Process for the preparation of a powdery calcium cellulose glycolate | Takahiro Koyama, Teturo Morita | 1985-04-02 |