Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4832707 | Metal-bonded tool and method of manufacturing same | Hisato Kamohara, Kagetaka Amano, Keizo Shimamura, Tatsuyoshi Aisaka | 1989-05-23 |
| 4820338 | Magnetic powder composition | Kumi Ochiai, Itsuo Arima, Mikio Morita | 1989-04-11 |