Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888623 | Semiconductor device with PN junction isolation for TTL or ECL circuits | Yasushi Yasuda, Yoshiki Shimauchi, Akinori Tahara | 1989-12-19 |
| 4883975 | Schmitt trigger circuit | Hirofumi Dohgome, Masao Kumagai, Toru Nakamura, Kimitaka Yoshiyama | 1989-11-28 |