Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7788854 | Elevator entrance door sill pivotable into and out of elevator shaft via hinge connected support and alignment brackets | Harold S. Friedman, Walter Guslawski, George Karazim | 2010-09-07 |