Davidshofer; Donald J.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Davidshofer; Donald J..The latest application filed is for "vacuum cleaner sound reducing device".
- Davidshofer; Donald J. - Bloomington IL
- Davidshofer; Donald J. - Charlotte NC
| Patent | Date |
|---|---|
| Vacuum cleaner sound reducing device Grant 8,650,707 - Hawkins , et al. February 18, 2 | 2014-02-18 |
| Vacuum Cleaner sound reducing device App 20130031743 - Hawkins; Thomas W. ; et al. | 2013-02-07 |
| Vacuum cleaner accessory valve Grant 8,234,750 - Hawkins , et al. August 7, 2 | 2012-08-07 |
| Vacuum cleaner bag flange Grant D657,510 - Chang , et al. April 10, 2 | 2012-04-10 |
| Vacuum Cleaner Accessory Valve App 20100175218 - Hawkins; Thomas W. ; et al. | 2010-07-15 |
| Vacuum bag mounting and viewing features Grant 7,662,200 - Knuth , et al. February 16, 2 | 2010-02-16 |
| Upright Vacuum Cleaner App 20080307597 - DAVIDSHOFER; Donald J. ; et al. | 2008-12-18 |
| Vacuum bag mounting and viewing features App 20070113528 - Knuth; Steven L. ; et al. | 2007-05-24 |
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