Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4967800 | Secondary confinement pipe having segments with interlocking rib and groove joints and coextruded sealant layers #4 | Peter Heilmayr | 1990-11-06 |
| 4911628 | Triwall siding apparatus | Peter Heilmayr, Cliff Hawkes | 1990-03-27 |
| 4874306 | Siding die | — | 1989-10-17 |
| 4856975 | Coextrusion block, especially for the coextrusion of generally flat PVC articles, such as siding | — | 1989-08-15 |