Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4730424 | Rooftop walkway | William J. Green | 1988-03-15 |
| 4689927 | Walkway for a sloping rooftop | William J. Green | 1987-09-01 |
| 4608801 | Floor bracing member for a ceramic tile floor | William J. Green | 1986-09-02 |
| 4464074 | Connector and web stiffener | William J. Green | 1984-08-07 |