| 8256061 |
Filter shaker assembly for sweeping machine |
Michael S. Wilmo, Michael S. Ardito, Richard W. Wellens |
2012-09-04 |
$5,570,000 |
| 7896936 |
Filter cleaning apparatus |
Kurt Clarence Adelman, Richard W. Wellens |
2011-03-01 |
$6,930,000 |
| 7665174 |
Cleaning head for use in a floor cleaning machine |
Warren L. Larson, Terence A. Peterson, Richard W. Wellens, Mark J. Fleigle |
2010-02-23 |
$5,968,000 |
| 7662199 |
Cyclonic filter for surface maintenance machine |
Richard W. Wellens, Karl Hansen |
2010-02-16 |
$5,842,000 |
| 7448114 |
Floor sweeping and scrubbing machine |
Terence A. Peterson, Warren L. Larson, Richard W. Wellens, Mark J. Fleigle, Don Durenberger +2 more |
2008-11-11 |
$4,452,000 |
| 7306639 |
Demisting chamber with elbow strainer |
Larry Wydra |
2007-12-11 |
$5,758,000 |
| 6449793 |
Tessellated cylindrical brush |
Joseph F. D'Costa, Warren L. Larson |
2002-09-17 |
$1,690,000 |
| 6421870 |
Stacked tools for overthrow sweeping |
Joseph F. D'Costa, Karl Hansen |
2002-07-23 |
$1,581,000 |
| 6286169 |
Tessellated cylindrical brush |
Joseph F. D'Costa, Warren L. Larson |
2001-09-11 |
|
| 6073295 |
Sweeping machine with movable recirculation flap |
Donald F. Durenberger, Joseph F. D'Costa |
2000-06-13 |
$3,424,000 |
| 6035479 |
Sweeper with auxiliary brush and auxiliary lip |
Christopher M. Danielson, Joseph F. D'Costa |
2000-03-14 |
$2,767,000 |
| 6018844 |
Composite side skirt for powered sweeper |
Joseph F. D'Costa, Todd M. Engel, Thomas E. Johansson |
2000-02-01 |
$2,750,000 |
| 5991953 |
Sweeping machine with multiple position front flap |
Donald F. Durenberger, Joseph F. D'Costa |
1999-11-30 |
$3,144,000 |
| 5967747 |
Low noise fan |
Steven A. Burke, Robert A. Geyer, Laurence A. Jensen |
1999-10-19 |
$3,116,000 |
| 5295277 |
Convertible sweeper |
Philip E. Koenigs |
1994-03-22 |
$1,982,000 |
| 5044043 |
Speed and steering control for a floor maintenance machine |
Robert M. Berdahl, Bruce E. Field |
1991-09-03 |
$883,000 |
| 4825500 |
Speed and steering control for a floor maintenance machine |
Robert M. Berdahl, Bruce F. Field |
1989-05-02 |
$1,121,000 |
| 4709771 |
Speed and steering control for a floor maintenance machine |
Robert M. Berdahl, Bruce E. Field |
1987-12-01 |
$1,041,000 |