Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7980843 | Concrete dispensing apparatus for pre-cast concrete forms | Melvin M. Zimmerman, Carl S. Martin | 2011-07-19 |
| 7736048 | Segmented auger for a concrete dispensing apparatus | Melvin M. Zimmerman, Carl S. Martin | 2010-06-15 |