Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4648224 | Tendon for prestressed concrete | Toshiyuki Kitta, Hiroshi Tada | 1987-03-10 |
| 4320548 | Method of erecting a bridge girder | Hiroshi Tada, Wataru Abe, Toshiro Nozu | 1982-03-23 |