Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4950008 | Auxiliary lock with an extensible device | — | 1990-08-21 |
| 4772055 | Auxiliary lock with an extensible device | — | 1988-09-20 |
| 4746154 | Tubular lock with an adjustable device for two-size setting | — | 1988-05-24 |
| 4736973 | Tubular door lock with a dead bolt adjustable in two sizes without anti-burglary device | — | 1988-04-12 |
| 4729586 | Cylinder door lock with a dead bolt adjustable in two sizes | — | 1988-03-08 |
| 4718706 | Tubular door lock with an adjustable device | — | 1988-01-12 |