Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5743124 | Method of bending extruded shapes | Keiichi Sugiyama, Tadashi Hakamada, Masayoshi Ohhashi, Kunihiro Yasunaga | 1998-04-28 |
| 4564119 | Aluminum can end | Shigeru Kohmura, Keiichi Sugiyama, Hisao Saitoh, Shigenori Saitoh | 1986-01-14 |