Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5314266 | Method of recycling construction and demolition debris | R. Paul Smith | 1994-05-24 |
| 5288171 | Method of recycling construction and demolition debris | R. Paul Smith | 1994-02-22 |