Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D861447 | Power floor grinding and sanding driver disc | — | 2019-10-01 |
| D858592 | Driver disc cushion mount for a floor grinder or sander | — | 2019-09-03 |
| 8678883 | Riding apparatus for polishing and cleaning floor surfaces | — | 2014-03-25 |
| 8262439 | Riding apparatus for treating floor surfaces with a power cord handling swing arm | — | 2012-09-11 |
| 6842940 | Floor scrubber | Ronald M. Christopher | 2005-01-18 |
| 6675424 | Litter vacuum | Wilton E. Smith, Gary E. Palmer, Jesse V. Mondigo | 2004-01-13 |
| 5993563 | Combination of main scrubbing machine and attachment scrubbing machine | Richard C. Brigman, Robert J. O'Hara | 1999-11-30 |
| 5802665 | Floor cleaning apparatus with two brooms | Christopher M. Knowlton, Robert J. O'Hara | 1998-09-08 |
| 5662426 | Drive hub and spindle assembly for cylindrical brooms | — | 1997-09-02 |
| 5630246 | Floor cleaning apparatus with flap having wear indicator | Christopher M. Knowlton, Robert J. O'Hara | 1997-05-20 |
| 5611108 | Floor cleaning apparatus with slidable flap | Christopher M. Knowlton, Robert J. O'Hara | 1997-03-18 |
| 5608947 | Floor cleaning apparatus with pre-filter | Christopher M. Knowlton, Robert J. O'Hara | 1997-03-11 |
| 5485653 | Floor cleaning apparatus | Christopher M. Knowlton, Robert J. O'Hara | 1996-01-23 |