Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889492 | High capacitance trench capacitor and well extension process | Howard K. H. Leung | 1989-12-26 |
| 4808543 | Well Extensions for trench devices | Louis C. Parrillo, Richard W. Mauntel | 1989-02-28 |