Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4957424 | Concrete pipe making machine | William J. Mitchell | 1990-09-18 |
| 4407648 | Counter rotating packerhead assembly | — | 1983-10-04 |
| 4340553 | Machine and method for making concrete product | — | 1982-07-20 |