Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4802918 | Case hardened steel and method of manufacturing the same | Takao Ooki | 1989-02-07 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4802918 | Case hardened steel and method of manufacturing the same | Takao Ooki | 1989-02-07 |