Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4795661 | Process for the manufacture of asphalt shingles | Alfredo A. Bondoc, Duane A. Davis, Stanley P. Frankoski | 1989-01-03 |
| 4717614 | Asphalt shingle | Alfredo A. Bondoc, Duane A. Davis, Stanley P. Frankoski | 1988-01-05 |