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Patent applications and USPTO patent grants for Hitzelberger; Joel E..The latest application filed is for "floor cleaning apparatus with twin agitators having different diameters".
Patent | Date |
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Dirt cup assembly with attachable and detachable external filter holder Grant 7,185,394 - Hafling , et al. March 6, 2 | 2007-03-06 |
Removable dirt cup assembly with external filter Grant 7,181,804 - Hafling , et al. February 27, 2 | 2007-02-27 |
Floor cleaning apparatus with twin agitators having different diameters App 20050172447 - Roney, Jeffrey T. ;   et al. | 2005-08-11 |
Removable dirt cup assembly with external filter App 20050071946 - Hafling, Danielle M. ;   et al. | 2005-04-07 |
Nozzle assembly with high efficiency agitator cavity App 20050022340 - Hafling, Danielle M. ;   et al. | 2005-02-03 |
Nozzle assembly with edge cleaning through agitator cavity App 20040168282 - Hitzelberger, Joel E. ;   et al. | 2004-09-02 |
Dirt cup assembly with attachable and detachable external filter holder App 20040088819 - Hafling, Danielle M. ;   et al. | 2004-05-13 |
Bagless vacuum cleaner with removable dirt cup App 20040088818 - Hafling, Danielle M. ;   et al. | 2004-05-13 |
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