Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4414255 | Water absorbing sheet assembly | Mitsuru Tokuyama, Yoshimi Tsuchiya, Hikotaro Kawaguchi, Kenji Ohki | 1983-11-08 |
| 4364985 | Porous sheet | Mitsuru Tokuyama, Kenji Ohki, Kaoru Tsujii | 1982-12-21 |
| 4347844 | Porous sheet and process for preparation thereof | Kenji Ohki, Mistru Tokuyama, Kenji Kawabuchi | 1982-09-07 |
| 4297410 | Absorbent material | Yoshimi Tsuchiya, Hiroshi Mizutani | 1981-10-27 |