Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8382425 | Hydraulic energy converter | — | 2013-02-26 |
| 6530116 | Vacuum cleaner with muffled detachable blower exhaust | Robert C. Berfield, Craig A. Seasholtz | 2003-03-11 |
| 6510583 | Cord retainer for vacuum cleaner | Kevin D. Fry | 2003-01-28 |
| 6499182 | Convertible blower port for vacuum cleaner | Robert C. Berfield, Kevin D. Fry, Randy L. Buss | 2002-12-31 |
| 6494544 | Axle and wheel mounting system for a wet/dry vacuum cleaner | Robert C. Berfield, David Martinez | 2002-12-17 |
| 6484351 | Latching system for a vacuum cleaner with detachable blower | Craig A. Seasholtz | 2002-11-26 |
| 6381803 | Vacuum cleaner | Robert C. Berfield, Mark E. Baer | 2002-05-07 |
| 6230361 | Dust pan closure for a vacuum cleaner | — | 2001-05-15 |