Issued Patents All Time
Showing 26–47 of 47 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6302457 | Easy-to-install door lock with improved anti-torque effect for outside rose assembly | — | 2001-10-16 |
| 6279360 | Cylindrical lock with simpler positioning assembly | — | 2001-08-28 |
| 6170305 | Interconnect mechanism for dual lock | — | 2001-01-09 |
| 6041630 | Clutch mechanism for a lock | — | 2000-03-28 |
| 6014878 | Lock with a freely rotatable outside handle | — | 2000-01-18 |
| 6014877 | Core retainer for a lock with an interchangeable lock core | — | 2000-01-18 |
| 5987947 | Manual control device for a pickproof lock assembly | — | 1999-11-23 |
| 5983687 | Positioning device for a cylindrical lock | — | 1999-11-16 |
| 5983683 | Adapter device for a key-in-lever type lock | — | 1999-11-16 |
| 5970760 | Lock core-changeable type auxiliary lock with improved pull-resistant structure | — | 1999-10-26 |
| 5941108 | Push button for a tubular lock unlockable by an inside handle thereof | — | 1999-08-24 |
| 5934117 | Lock with a clutching outer handle | — | 1999-08-10 |
| 5906125 | Auxiliary lock | — | 1999-05-25 |
| 5904232 | Clutch assembly enabling a free turn of an outer handle of a door with respect to a latch assembly of a lock | — | 1999-05-18 |
| 5887465 | Torsion spring positioning means of a cylindrical lock | — | 1999-03-30 |
| 5881586 | Lockset cartridge with a smooth guide | — | 1999-03-16 |
| 5845522 | Fastening arrangement for a cylindrical lock | — | 1998-12-08 |
| 5813708 | Tubular latch with a torsion spring disposed thereto | — | 1998-09-29 |
| 5787741 | Cartridge assembly of a panic proof lock | — | 1998-08-04 |
| 5768926 | Lock having an exterior door handle capable of a free turning movement | — | 1998-06-23 |
| 5752399 | Door handle assembly with reversible core retainer | — | 1998-05-19 |
| 5713231 | Protective cover for double-sided type auxiliary locks | — | 1998-02-03 |