Issued Patents All Time
Showing 1–2 of 2 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, Jeffrey Freidman, Walter Guslawski | 2010-09-07 |
| 6938380 | Elevator entrance sill structure and installation method | Harold S. Friedman, Richard Michalik, Jeffrey Friedman | 2005-09-06 |