Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D336347 | Tab portion of a shingle | Marica G. Hannah, George W. Mehrer, Michael J. Noone, Kermit E. Stahl | 1993-06-08 |
| 5209802 | Method of making a multi-layer shingle | Marcia G. Hannah, George W. Mehrer, Michael J. Noone, Kermit E. Stahl | 1993-05-11 |
| 5181361 | Multi-layer shingle | Marcia G. Hannah, George W. Mehrer, Michael J. Noone, Kermit E. Stahl | 1993-01-26 |