Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886571 | Surface treatment and apparatus therefor | Keizo Suzuki, Susumu Hiraoka | 1989-12-12 |
| 4828874 | Laser surface treatment method and apparatus for practicing same | Susumu Hiraoka, Keizo Suzuki | 1989-05-09 |