Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4690020 | Apparatus for working peripheral wall of hemispherical shell | Ryoichiro Sasano, Toshimichi Takigawa | 1987-09-01 |
| 4617845 | Method and apparatus for working peripheral wall of hemispherical shell | Ryoichiro Sasano, Toshimichi Takigawa | 1986-10-21 |