Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4839302 | Method for fabricating bipolar semiconductor device | Shuichi Kameyama, Kazuhiro Kobushi, Hiroyuki Sakai | 1989-06-13 |
| 4826780 | Method of making bipolar transistors | Toyoki Takemoto, Haruyasu Yamada, Tsutomu Fujita | 1989-05-02 |