Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8984835 | Laminated shingle with wider nailing zone | Husnu M. Kalkanoglu, Kermit E. Stahl | 2015-03-24 |
| 8813453 | Laminated shingle with wider nailing zone | Husnu M. Kalkanoglu, Kermit E. Stahl | 2014-08-26 |
| 8240100 | Laminated shingle with wider nailing zone | Husnu M. Kalkanoglu, Kermit E. Stahl | 2012-08-14 |
| 7934346 | Process of treating a synthetic shingle and shingle made thereby | Thomas Kevin MacKinnon, Douglas H. Wylie | 2011-05-03 |
| 6192651 | Method of forming foam-filled decorative muntin bar for windows and the like | — | 2001-02-27 |
| 6035597 | Foam-filled decorative muntin bar for windows and the like | — | 2000-03-14 |