Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6234713 | Vibrator truss assembly | Frederick A. Blom, Dean A. Johnson | 2001-05-22 |
| 5791815 | Vibrating compactor assembly for use with a concrete finishing machine | — | 1998-08-11 |
| 4993869 | Concrete finishing machine with vibrating finishing rollers | Ewald R. Ulmer | 1991-02-19 |
| 4775262 | Concrete finishing machine with vibrating compactor unit | Robert L. Guntharp | 1988-10-04 |
| 4708520 | Concrete finishing machine with adjustable auger unit | — | 1987-11-24 |
| 4484834 | Pavers | Ewald R. Ulmer | 1984-11-27 |
| 4320987 | Concrete vibrator machine | Herbert C. Glesmann, Ewald R. Ulmer | 1982-03-23 |
| 4256415 | Concrete vibrator machine | Robert T. Conway, Herbert C. Glesmann, Richard W. Kruse | 1981-03-17 |