Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4689850 | Pulley mount for window balance system | — | 1987-09-01 |
| 4672713 | Spring coupler for block and tackle window balance system | William P. Newton | 1987-06-16 |
| 4654928 | Adjustable friction block and tackle window balance system | — | 1987-04-07 |