Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5109088 | Resin composition for cement | Kazuyuki Tanaka | 1992-04-28 |
| 5075404 | Concrete-protective material | Kazuyuki Tanaka, Etsuji Iwami | 1991-12-24 |
| 4923929 | Process for producing graft copolymer | Kengo Kobayashi | 1990-05-08 |