Issued Patents All Time
Showing 26–50 of 75 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9376834 | Screwless sash lock for metal and plastic window sashes and the like | Tong Liang, David Chen | 2016-06-28 |
| D756746 | Sash lock and keeper | Tong Liang, David Chen | 2016-05-24 |
| 9127486 | Sash window and door transportation clip assembly | David Chen | 2015-09-08 |
| 9115529 | Casement window opening control device | Tong Liang, David Chen | 2015-08-25 |
| 9103144 | Door travel limiting device | Tong Liang, David Chen | 2015-08-11 |
| D730713 | Sash lock and keeper | Tong Liang, David Chen | 2015-06-02 |
| D721942 | Sash lock and keeper | Tong Liang, David Chen | 2015-02-03 |
| 8870244 | Sash lock with signal | Tong Liang, David Chen | 2014-10-28 |
| 8844985 | Force entry resistant sash lock | Tong Liang, David Chen | 2014-09-30 |
| 8833809 | Window vent stop with flexible side engagement pieces | Tong Liang, David Chen | 2014-09-16 |
| 8789857 | Force entry resistant sash lock | Tong Liang, David Chen | 2014-07-29 |
| 8789862 | Adjustable after-market sash window stop | David Chen | 2014-07-29 |
| 8657347 | Auto lock | David Chen | 2014-02-25 |
| 8567830 | Auto cam lock | David Chen | 2013-10-29 |
| 8511724 | Window sash latch | Tong Liang, David Chen | 2013-08-20 |
| 8414039 | Sash lock with signal | David Chen, Tong Liang | 2013-04-09 |
| 8360484 | Vent stop for wooden and other windows | Tong Liang, David Chen | 2013-01-29 |
| 8336927 | Tilt latch with cantilevered angular extension | Toni Liang, Toug Liang, David Chen | 2012-12-25 |
| 8336930 | Window sash latch | Tong Liang, David Chen | 2012-12-25 |
| 8235430 | Window vent stop with flexible side engagement pieces | Tong Liang, David Chen | 2012-08-07 |
| 8220846 | Latch for tiltable sash windows | Tong Liang, David Chen | 2012-07-17 |
| 8132290 | Block and tackle balance assembly with rotatable shoe | Tong Liang, David Chen | 2012-03-13 |
| 8032989 | Casement window hinge | Tong Liang, David Chen | 2011-10-11 |
| 7941898 | Window rotating handle | Tong Liang | 2011-05-17 |
| 7905521 | Multi-point sliding door latch | Tong Liang, David Chen | 2011-03-15 |