Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6540829 | Metal roofing shingle stock and method for making it | Jack C. Allman, Ronald J. Lewarachik | 2003-04-01 |
| 6485781 | Metal roofing shingle stock and method for making it | Jack C. Allman, Ronald J. Lewarchik | 2002-11-26 |