Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6318769 | Backset adjustment structure of dead bolt assembly for door lock | — | 2001-11-20 |
| 6216500 | Device for unlocking tubular-type door lock in conjunction with indoor handle | — | 2001-04-17 |
| 5881585 | Apparatus for simultaneously unlocking a door lock and a dead bolt | — | 1999-03-16 |
| 5868018 | Door lock | — | 1999-02-09 |