Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5590554 | Endlessly clockwise/counterclockwise idly rotatable burgularproof door lock | — | 1997-01-07 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5590554 | Endlessly clockwise/counterclockwise idly rotatable burgularproof door lock | — | 1997-01-07 |