Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4602659 | Repair in holes and cracks in clay sewer pipe | — | 1986-07-29 |
| 4601312 | Repair of holes and cracks in clay sewer pipe | — | 1986-07-22 |
| 4520795 | Solar collector having tank and glazing construction | Horace W. Ladd, Andrew M. Mellon | 1985-06-04 |