Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6296224 | Concrete form member | — | 2001-10-02 |
| 5761874 | Concrete form spacing fixture | — | 1998-06-09 |
| 5632923 | Concrete molding form member | — | 1997-05-27 |
| 4702927 | Method for drying water retentive substance | Motohiko Hirotsuka, Tetsuro Harada, Nobuhiro Ohtsubo, Hiroyuki Kawade, Hitoshi Taniguchi | 1987-10-27 |