Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5879132 | Stainless steel type 13Cr5Ni having high toughness, and usage of the same | Kenichi Usami, Hiroshi Takayasu, Tsutomu Onuma, Masao Kawakami, Fumio Sakamoto +2 more | 1999-03-09 |
| 5601411 | Stainless steel type 13Cr5Ni having high toughness, and usage the same | Kenichi Usami, Hiroshi Takayasu, Tsutomu Onuma, Masao Kawakami, Fumio Sakamoto +2 more | 1997-02-11 |