Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6108859 | High efficiency squeegee | — | 2000-08-29 |
| RE36565 | Mobile surface scrubber solution recovery system | Donald E. Line | 2000-02-15 |
| 5623743 | Mobile surface scrubber solution recovery system | Donald E. Line | 1997-04-29 |
| 5588179 | Dust box emptying device | Douglas A. Bargiel, Michael Combs | 1996-12-31 |
| 5509162 | Hinged brush retaining arm for sweepers | — | 1996-04-23 |
| 5194077 | Dual chamber filter assembly with shaker | Douglas A. Bargiel, Anthony P. DiGiovanni, Norbert H. Himburg | 1993-03-16 |
| 4619010 | Scrubber with mechanism for automatically raising and lowering a squeegee assembly | — | 1986-10-28 |
| 4429433 | Surface cleaning machine with squeegee assembly | — | 1984-02-07 |
| 4369540 | Floor cleaning machine | David J. Karpanty | 1983-01-25 |
| D265857 | Carpet cleaning tool | John Michael Hayes | 1982-08-17 |
| 4327455 | Surface cleaning machine with hopper dumping mechanism | — | 1982-05-04 |
| 4328014 | Sweeper hopper with filter assembly | Christopher M. Knowlton | 1982-05-04 |
| 4219901 | Riding sweeper | Christopher M. Knowlton | 1980-09-02 |
| 4200951 | Machine for cleaning surfaces | William R. Smith | 1980-05-06 |