Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4871685 | Method of manufacturing bipolar transistor with self-aligned external base and emitter regions | Shin-ichi Taka | 1989-10-03 |
| 4853342 | Method of manufacturing semiconductor integrated circuit device having transistor | Shin-ichi Taka | 1989-08-01 |
| 4853760 | Semiconductor device having insulating layer including polyimide film | Masahiro Abe, Masaharu Aoyama, Takashi Ajima | 1989-08-01 |