Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5121951 | Window frame design with correspoding window latch & vent sealing device | John Harbom | 1992-06-16 |
| 5058321 | Pivoting & locking device for a window or door sash | John Harbom | 1991-10-22 |
| 5044121 | Improved window and door structure | John Harbom | 1991-09-03 |