Issued Patents 1982
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4354891 | Method of curing polyester resin in the presence of rubber | Charles Lostak, Manfred Klepetar | 1982-10-19 |
| 4329193 | Method of making a coupling for rigid pressure pipe | Charles Lostak, Robert W. Heisler, Joseph P. Ferraro, Henry J. Kazienko | 1982-05-11 |
| 4319950 | Mandrel for making a coupling for rigid pressure pipe | Charles Lostak, Robert W. Heisler, Joseph P. Ferraro, Henry J. Kazienko | 1982-03-16 |