Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4450424 | Electrical insulating system | Paul F. Hettwer, Vu H. Viet, Clarence R. Acker | 1984-05-22 |
| 4407697 | Process for making electrical insulating paper and the product thereof | Paul F. Hettwer, Vu H. Viet, Clarance R. Acker | 1983-10-04 |