Issued Patents 1989
Showing 1–1 of 1 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 |
Showing 1–1 of 1 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 |