Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6990710 | Counterbalance system for a tilt-in window having an improved shoe assembly and anchor mount | John R. Kunz | 2006-01-31 |
| 6860066 | Shoeless curl spring counterbalance system for a tilt-in window | John R. Kunz | 2005-03-01 |
| 6857228 | Counterbalance system for a tilt-in window | John R. Kunz | 2005-02-22 |