Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8562308 | Regenerative hydraulic lift system | David A. Krug, Stanley D. Nelsen | 2013-10-22 |
| 8083499 | Regenerative hydraulic lift system | David A. Krug, Stanley D. Nelsen | 2011-12-27 |
| 5277853 | Method for forming concrete blocks | Robert A. Schmitt | 1994-01-11 |
| 5219591 | Apparatus for forming concrete blocks | Robert A. Schmitt | 1993-06-15 |
| 5059110 | Apparatus for forming concrete blocks having plural separately driven vibrator sets | Robert A. Schmitt | 1991-10-22 |