Issued Patents 2005
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6860066 | Shoeless curl spring counterbalance system for a tilt-in window | Keith Kannengieszer | 2005-03-01 |
| 6857228 | Counterbalance system for a tilt-in window | Keith Kannengieszer | 2005-02-22 |