Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5603194 | Apparatus for retrofitting an existing door to provide a fire rating to the unrated existing door | Semyon Fridlyand | 1997-02-18 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5603194 | Apparatus for retrofitting an existing door to provide a fire rating to the unrated existing door | Semyon Fridlyand | 1997-02-18 |