Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4861439 | Method of improving the capacitance of anodized aluminum foil | Roland F. Dapo | 1989-08-29 |
| 4828659 | Controlled hydration of low voltage aluminum electrolytic capacitor foil | — | 1989-05-09 |