Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880464 | Electroless gold plating solution | Jiro Ushio, Osamu Miyazawa, Akira Tomizawa | 1989-11-14 |
| 4804559 | Electroless gold plating solution | Jiro Ushio, Osamu Miyazawa, Akira Tomizawa | 1989-02-14 |