Issued Patents 1989
Showing 1–1 of 1 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 |
Showing 1–1 of 1 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 |