Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6565062 | Apparatus for the splitting of cast concrete dual blocks | Douglas F. Silk | 2003-05-20 |
| 6226954 | Process and apparatus for the splitting of cast concrete dual blocks | Douglas F. Silk | 2001-05-08 |