Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6705332 | Hard floor surface cleaner utilizing an aerated cleaning liquid | Bruce F. Field, Bryan Christensen | 2004-03-16 |
| 6585827 | Apparatus and method of use for cleaning a hard floor surface utilizing an aerated cleaning liquid | Bruce F. Field, Earl Krueger, Bryan Christensen, James J. Seifert | 2003-07-01 |
| 6398829 | Filter system for mobile debris collection machine | Kevin L. Shinler | 2002-06-04 |
| 6389641 | Dual mode debris pickup machine | Steven L. Boomgaarden, Gregory J. Engel | 2002-05-21 |
| 5611105 | Torsionally flexible frame structure | Robert A. Geyer | 1997-03-18 |
| 5515568 | Scrubbing machine having offset cylindrical brushes | Warren L. Larson, Robert A. Geyer, Michael S. Wilmo | 1996-05-14 |
| 5483718 | Floor scrubbing machine having impact energy absorption | Robert A. Geyer, Michael S. Wilmo | 1996-01-16 |
| 5093955 | Combined sweeper and scrubber | William J. Sampson | 1992-03-10 |
| 4819676 | Combination sweeping and scrubbing system and method | Archie A. Weidner | 1989-04-11 |
| 4580313 | Walk behind floor maintenance machine | — | 1986-04-08 |
| 4466156 | Air velocity control mechanism for selective debris pickup | — | 1984-08-21 |