Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5657587 | Floating accessible areaway system | — | 1997-08-19 |
| 5107640 | Modular accessible areaway system | Fredric J. Hattman | 1992-04-28 |
| 4876833 | Accessible areaway system | Fredric J. Hattman | 1989-10-31 |