Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5657603 | Preparing sheet metal and fabricating roofing shingles | Robert R. Goodhart, Jane M. Brown | 1997-08-19 |
| 5495654 | Preparing sheet metal and fabricating roofing shingles | Robert R. Goodhart, Jane M. Brown | 1996-03-05 |