Issued Patents All Time
Showing 1–23 of 23 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11859424 | Window counterbalance brake shoe and spring assembly with improved brake strength | — | 2024-01-02 |
| 10941599 | Mounting system for mounting a coil spring to a window frame in a sash counterbalance system | — | 2021-03-09 |
| 10415287 | Counterbalance system for tilt-in window having a shielded brake shoe structure | — | 2019-09-17 |
| 10174537 | Ribbon coil spring anchor mount system for use in a window counterbalance assembly | — | 2019-01-08 |
| 10081972 | Versatile and economic anchor mount for a coil spring in a window counterbalance assembly | — | 2018-09-25 |
| 9995071 | System and method for inhibiting window sash drift | — | 2018-06-12 |
| 9845626 | Removable window sash system with integrated spring biased retainer | — | 2017-12-19 |
| 9371677 | Brake shoe with contact posts that increase brake strength and improve the interconnection between the brake shoe and a counterbalance spring of a tilt-in window | — | 2016-06-21 |
| 9334683 | System and method for providing a more reliable interconnection between a spring and a brake shoe in the counterbalance system of a tilt-in window | — | 2016-05-10 |
| 8640383 | System and method for retaining a proper interconnection between a tilt-post and a brake shoe in the counterbalance system of a tilt-in window | — | 2014-02-04 |
| 8505242 | Counter balance system for a window having side loading sashes | — | 2013-08-13 |
| 8464466 | Window having a counterbalance system that maximizes egress opening | — | 2013-06-18 |
| 8458878 | Coil spring mounting system and method for use in a tilt-in window counterbalance assembly | — | 2013-06-11 |
| 8424245 | Window construction utilizing sash spacer assemblies | Fred D. Kershaw | 2013-04-23 |
| 8371068 | System and method for improving the wear life of a brake shoe in the counterbalance system of a tilt-in window | — | 2013-02-12 |
| 8181396 | Mounting system for a coil spring in a window counterbalance assembly | — | 2012-05-22 |
| 8099312 | Project management system and method | Yan Jin, Raymond Levitt, Marc C. Ramsey, Carlos Rivero, Charles Thaeler | 2012-01-17 |
| 7980028 | Coil spring counterbalance system for side loading window sashes | — | 2011-07-19 |
| 7966770 | Rounded shoe and position brake assembly for the counterbalance system of a tilt-in window | — | 2011-06-28 |
| 7483841 | Project management system and method | Yan Jin, Raymond Levitt, Marc C. Ramsey, Carlos Rivero, Charles Thaeler | 2009-01-27 |
| 6990710 | Counterbalance system for a tilt-in window having an improved shoe assembly and anchor mount | Keith Kannengieszer | 2006-01-31 |
| 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 |