Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4800741 | Electrically and manually operable door lock with convenient backset selection | Sidney Kerschenbaum, Charles Kerschenbaum | 1989-01-31 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4800741 | Electrically and manually operable door lock with convenient backset selection | Sidney Kerschenbaum, Charles Kerschenbaum | 1989-01-31 |