Issued Patents All Time
Showing 101–123 of 123 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D470279 | Vacuum cleaner with detachable blower | John Griffin, Craig A. Seasholtz | 2003-02-11 |
| D469934 | Vacuum cleaner with detachable blower | Kevin D. Fry, John Griffin, Craig A. Seasholtz | 2003-02-04 |
| 6451078 | Fitting for vacuum bags | Robert C. Berfield | 2002-09-17 |
| 6222285 | Intelligent switch control circuit | Edward M. Haley, James M. Robitaille, Mark E. Baer | 2001-04-24 |
| D434537 | Vacuum cleaner head | John Griffin, Craig A. Seasholtz, David Martinez | 2000-11-28 |
| D426687 | Vacuum cleaner head | John Griffin, Craig A. Seasholtz, David Martinez | 2000-06-13 |
| D426360 | Vacuum cleaner head | John Griffin, Craig A. Seasholtz, David Martinez | 2000-06-06 |
| 6069330 | Mechanical shut-off and bypass assembly | Craig A. Seasholtz | 2000-05-30 |
| 5918344 | Self-evacuating vacuum cleaner | Craig A. Seasholtz | 1999-07-06 |
| 5747973 | Current regulating switch circuit | James M. Robitaille, Mark E. Baer | 1998-05-05 |
| 4650200 | Dolly with tank holding device | Robert C. Berfield, Donald G. Rightnour | 1987-03-17 |
| D287895 | Motor housing for canister type electric vacuum cleaner | Robert C. Berfield, Ronald F. Meland | 1987-01-20 |
| 4635951 | Dolly bumper | Robert C. Berfield | 1987-01-13 |
| D287658 | Motor housing for canister type electric vacuum cleaner | Robert C. Berfield, Ronald F. Meland | 1987-01-06 |
| D287171 | Motor housing for canister type electric vacuum cleaner | Robert C. Berfield, Ronald F. Meland | 1986-12-09 |
| D286336 | Tank for electric vacuum cleaner | Robert C. Berfield | 1986-10-21 |
| 4616378 | Means for mounting floor pickup nozzle to dolly for vacuum cleaner | Robert C. Berfield | 1986-10-14 |
| 4609387 | Collapsible support cage for vacuum cleaner filter | Robert C. Berfield | 1986-09-02 |
| 4606563 | Conduit fixture for tank wall | Robert C. Berfield | 1986-08-19 |
| 4577366 | Vacuum cleaner nozzle having rotating brush | Jonathan Miller, Robert C. Berfield | 1986-03-25 |
| 4538971 | Assembly of tank lid and fan means of a wet/dry vacuum | Jonathan Miller, Rudolph W. Wacek, Robert C. Berfield, Ronald F. Meland, Lonnie B. Lawson, Jr. | 1985-09-03 |
| 4508550 | Air flow responsive outlet from tank of vacuum cleaner | Robert C. Berfield, Lonnie B. Lawson, Jr. | 1985-04-02 |
| 4388920 | Variable position knee immobilizer | Mark J. Hajost, Fred B. Powell | 1983-06-21 |