Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D388195 | Shingle | Marcia G. Hannah, Kermit E. Stahl, George W. Mehrer, Joseph Quaranta | 1997-12-23 |
| 5660014 | Composite shingle having shading zones in different planes | Kermit E. Stahl, George W. Mehrer | 1997-08-26 |