Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4871401 | Fluidized bed method of forming a nitride or carbonitride layer | Tohru Arai, Hiromasa Takeda | 1989-10-03 |
| 4844949 | Method of surface treatment and apparatus used therefor | Tohru Arai, Hiromasa Takeda | 1989-07-04 |