Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5012554 | Automatic anchoring system for window spring | — | 1991-05-07 |
| 4800680 | Cord guide system for sash balance | Norman R. Westfall, Patrick E. Milligan, John I. Habbersett | 1989-01-31 |
| 4540070 | Vibration dampener for coil tension window balance spring | John R. Yonovich, William P. Newton | 1985-09-10 |