Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880493 | Electronic-carrier-controlled photochemical etching process in semiconductor device fabrication | Carol I. H. Ashby, Frederick L. Vook | 1989-11-14 |
| 4866498 | Integrated circuit with dissipative layer for photogenerated carriers | — | 1989-09-12 |