Issued Patents 1997
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5665284 | Process for manufacturing foam-filled extruded products | Ronald D. Erwin | 1997-09-09 |
| 5660016 | Foam-filled extruded decking plank and decking attachment system | Ronald D. Erwin | 1997-08-26 |
| 5620136 | Foam-filled plastic mailbox post | Ronald D. Erwin | 1997-04-15 |
| D378462 | Mailbox post with support arm | Ronald D. Erwin | 1997-03-11 |