Issued Patents All Time
Showing 1–25 of 42 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10844636 | Combination forced entry resistant sash lock and tilt latch, also functioning as a window opening control device | Luke Liang, David Chen | 2020-11-24 |
| 10633897 | Tamper-resistant lock | Luke Liang, David Chen, Troy A. Kirkland | 2020-04-28 |
| 10323446 | Integrated sash lock and tilt latch combination with improved interconnection capability therebetween | Luke Liang, David Chen | 2019-06-18 |
| 10174530 | Casement window opening control device with sliding arms | Luke Liang, David Chen | 2019-01-08 |
| 10119310 | Combination sash lock and tilt latch with improved interconnection for blind mating of the latch to the lock | Luke Liang, David Chen | 2018-11-06 |
| 10107021 | Window vent stop with plastic spring member for bi-directional biasing of the tumbler | Luke Liang, David Chen | 2018-10-23 |
| 10053896 | Window vent stop with flexible side engagement pieces | Luke Liang, David Chen | 2018-08-21 |
| 10006232 | Window vent stop with flexible side engagement pieces | Luke Liang, David Chen | 2018-06-26 |
| 9670705 | Casement window opening control device | Luke Liang, David Chen | 2017-06-06 |
| 9388612 | Casement window opening control device | Luke Liang, David Chen | 2016-07-12 |
| 9376834 | Screwless sash lock for metal and plastic window sashes and the like | Luke Liang, David Chen | 2016-06-28 |
| D756746 | Sash lock and keeper | Luke Liang, David Chen | 2016-05-24 |
| 9115529 | Casement window opening control device | Luke Liang, David Chen | 2015-08-25 |
| 9103144 | Door travel limiting device | Luke Liang, David Chen | 2015-08-11 |
| D730713 | Sash lock and keeper | Luke Liang, David Chen | 2015-06-02 |
| D721942 | Sash lock and keeper | Luke Liang, David Chen | 2015-02-03 |
| 8870244 | Sash lock with signal | Luke Liang, David Chen | 2014-10-28 |
| 8844985 | Force entry resistant sash lock | Luke Liang, David Chen | 2014-09-30 |
| 8833809 | Window vent stop with flexible side engagement pieces | Luke Liang, David Chen | 2014-09-16 |
| 8789857 | Force entry resistant sash lock | Luke Liang, David Chen | 2014-07-29 |
| 8511724 | Window sash latch | Luke Liang, David Chen | 2013-08-20 |
| 8414039 | Sash lock with signal | Luke Liang, David Chen | 2013-04-09 |
| 8360484 | Vent stop for wooden and other windows | Luke Liang, David Chen | 2013-01-29 |
| 8336930 | Window sash latch | Luke Liang, David Chen | 2012-12-25 |
| 8235430 | Window vent stop with flexible side engagement pieces | Luke Liang, David Chen | 2012-08-07 |