Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5246258 | Rim type door lock with interchangeable bolt assemblies and adjustable backset plate assemblies | Sidney Kerschenbaum | 1993-09-21 |
| 4800741 | Electrically and manually operable door lock with convenient backset selection | Sidney Kerschenbaum, Charles Kerschenbaum | 1989-01-31 |