Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885615 | Monocrystalline three-dimensional integrated circuit | Ronald D. Schrimpf, Alfons Tuszynski | 1989-12-05 |
| 4868624 | Channel collector transistor | Bernard L. Grung, Thomas E. Zipperian | 1989-09-19 |