Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4873808 | Spacer block for standing seam roof | Raymond K. Heisey, Jr., W. David Barker, Vernon L. Thurnau | 1989-10-17 |
| 4557098 | Deformable centering sleeve for tab of roof panel attachment clip unit | Vernon L. Thurnau | 1985-12-10 |
| 4543760 | Attachment clip unit for standing seam roof | W. David Barker, Raymond K. Heisey, Jr. | 1985-10-01 |