Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6202798 | Elevator entrance door assembly and method of installation | Harold S. Friedman, Richard Michalik | 2001-03-20 |
| 6145630 | Sliding elevator-door assembly and method of installation | Harold S. Friedman, Richard Michalik | 2000-11-14 |