Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7124463 | Conveyor lip for motorized street sweeper | Thomas P. Mathews, Michael H. Lenzmeier, Gregory J. Engel | 2006-10-24 |
| 6877180 | Street sweeper main broom cutoff flap | Michael S. Wilmo | 2005-04-12 |
| 5045118 | Method of removing debris and dust from a carpet | Richard A. Mason | 1991-09-03 |
| 4819676 | Combination sweeping and scrubbing system and method | Michael L. Blehert | 1989-04-11 |