Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5223087 | Chemical solubilizing agent for tin or tin alloy | Akira Hirai | 1993-06-29 |
| 5211927 | Method for stabilizing acidic aqueous hydrogen peroxide solution containing copper | Yoko Miyashiro | 1993-05-18 |
| 5030373 | Surface-treating agents for copper and copper alloy | Toshiya Kimura, Koichi Wakashima, Hidebumi Ohnuki, Shigeki Nakajima, Akira Hirai | 1991-07-09 |