Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7360275 | Dirt separation system for a vacuum cleaner | David M. J. Allgeier, Jerry L. Balzer, David C. Kumpf | 2008-04-22 |
| 7247182 | Filter assembly for a vacuum cleaner | Russell H. Boyer, Jr., Jerry L. Balzer, Michael A. Durbin, Leron R. Thomas | 2007-07-24 |
| D534699 | Portion of a portable cleaning machine | David W. Moine, Ronald J. Stephens, William G. Alford, Richard S. Parr, Douglas C. Barker | 2007-01-02 |
| 7152274 | Handle and latch for a removable dirt separation system | William G. Alford | 2006-12-26 |
| D517260 | Portable cleaning machine | David W. Moine, Ronald J. Stephens, William G. Alford, Richard S. Parr, Douglas C. Barker | 2006-03-14 |
| 6875255 | Removable dirt separation system for a vacuum cleaner | William G. Alford, Jerry L. Balzer, Greg A. Bilek, Joseph A. Garisto, David C. Kumpf +3 more | 2005-04-05 |
| 6421862 | Carpet extractor fluid supply system | David G. Mueller, Kevin L. Thomas | 2002-07-23 |
| 6247202 | Carpet extractor fluid supply system | David G. Mueller, Kevin L. Thomas | 2001-06-19 |
| 5779744 | Air and liquid separator for a carpet extractor | David G. Mueller | 1998-07-14 |