Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6248271 | Method of making an insert for use in a mold for molding roof covering products | William David Graham, Jean E. Schelhorn | 2001-06-19 |
| 5946877 | Composite shingle having target nailing areas | Charles E. Gallinat, Thomas K. Thompson | 1999-09-07 |