Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5992907 | Lock and tilt latch for sliding windows | Cynthia L. Sheldon, Robbin J. Delaske, Joseph P. Landherr | 1999-11-30 |
| 5901499 | Double-hung window locking system | Robbin J. Delaske, Joseph P. Landherr | 1999-05-11 |