Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4664679 | Aqueous dispersion of silicic anhydride and abrasive composition comprising the dispersion | Katsuhisa Kohyama, Tsuneo Kimura, Yukio Kajiwara | 1987-05-12 |
| 4452976 | Process for producing aromatic polyester polycarbonate particles | Katsuhisa Kohyama, Akira Matsuno, Kenji Tsuruhara | 1984-06-05 |