Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4839303 | Planar bipolar transistors including heterojunction transistors and method | Benedict B. O'Brien, William Hant, King L. Hu | 1989-06-13 |
| 4818712 | Aluminum liftoff masking process and product | — | 1989-04-04 |