Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4915740 | Hydraulic material composition having high strength | Etsuo Sakai, Tutomu Kida, Yasuhito Fushii | 1990-04-10 |
| 4292426 | Process of producing hydroxypropyl cellulose | Seiji Orii, Akinori Ito | 1981-09-29 |