Fretz; Robert J.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Fretz; Robert J..The latest application filed is for "head direction hearing assist switching".
- Fretz; Robert J. - Maplewood MN
| Patent | Date |
|---|---|
| Head direction hearing assist switching Grant 10,687,157 - Fretz | 2020-06-16 |
| Feedback reduction for high frequencies Grant 10,499,165 - Fretz De | 2019-12-03 |
| Head Direction Hearing Assist Switching App 20190116434 - Fretz; Robert J. | 2019-04-18 |
| Feedback Reduction For High Frequencies App 20170332180 - Fretz; Robert J. | 2017-11-16 |
| Hearing aid positioning system and structure Grant 9,571,939 - Fretz , et al. February 14, 2 | 2017-02-14 |
| Ear contact pressure wave hearing aid switch Grant 8,767,987 - Fretz July 1, 2 | 2014-07-01 |
| Hearing Aid Positioning System And Structure App 20140105438 - Fretz; Robert J. ; et al. | 2014-04-17 |
| Hearing aid positioning system and structure Grant 8,605,927 - Fretz , et al. December 10, 2 | 2013-12-10 |
| Switch for a hearing aid Grant 8,358,797 - Fretz January 22, 2 | 2013-01-22 |
| Hearing aid circuit with feedback transition adjustment Grant 8,355,517 - Fretz January 15, 2 | 2013-01-15 |
| Hearing aid body Grant D671,218 - Daavettila , et al. November 20, 2 | 2012-11-20 |
| Soft Concha Ring Behind-The-Ear Hearing Aid App 20120237068 - Fretz; Robert J. ; et al. | 2012-09-20 |
| Hearing Aid Positioning System And Structure App 20120076336 - Fretz; Robert J. ; et al. | 2012-03-29 |
| Ear Contact Pressure Wave Hearing Aid Switch App 20110142269 - Fretz; Robert J. | 2011-06-16 |
| Soft Concha Ring In-The-Ear Hearing Aid App 20110075871 - Fretz; Robert J. ; et al. | 2011-03-31 |
| Switch For A Hearing Aid App 20100040239 - Fretz; Robert J. | 2010-02-18 |
| Hearing aid circuit reducing feedback Grant 7,519,193 - Fretz April 14, 2 | 2009-04-14 |
| Behind the ear hearing aid system Grant 7,027,608 - Fretz , et al. April 11, 2 | 2006-04-11 |
| Method of manufacturing hearing aid ear tube App 20050190939 - Fretz, Robert J. | 2005-09-01 |
| Hearing aid circuit reducing feedback App 20050047620 - Fretz, Robert J. | 2005-03-03 |
| Behind The Ear Hearing Aid System App 20030002700 - FRETZ, ROBERT J. ; et al. | 2003-01-02 |
| Open ear canal hearing aid system Grant 6,275,596 - Fretz , et al. August 14, 2 | 2001-08-14 |
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