Inventor · disambiguated record
Robert J. Fretz
Also filed as: FRETZ ROBERT · FRETZ ROBERT J
15 granted patents·3 pending applications·431 citations·filing 1987–2018
93Inventor score
Top patents by PatentIndex Score
18 records- 0191US8355517B1Hearing aid circuit with feedback transition adjustmentINTRICON CORP·Filed 2010·Granted Jan 15, 2013·19 cites·48 claims
- 0290US7519193B2Hearing aid circuit reducing feedbackRESISTANCE TECHNOLOGY INC·Filed 2004·Granted Apr 14, 2009·59 cites·18 claims
- 0390US6275596B1Open ear canal hearing aid systemGN RESOUND CORP·Filed 1997·Granted Aug 14, 2001·178 cites·32 claims
- 0488US7027608B2Behind the ear hearing aid systemGN RESOUND NORTH AMERICA·Filed 1998·Granted Apr 11, 2006·130 cites·23 claims
- 0582US8605927B2Hearing aid positioning system and structureFRETZ ROBERT J·Filed 2011·Granted Dec 10, 2013·9 cites·22 claims
- 0681US8767987B2Ear contact pressure wave hearing aid switchFRETZ ROBERT J·Filed 2011·Granted Jul 1, 2014·8 cites·21 claims
- 0776US9571939B2Hearing aid positioning system and structureINTRICON CORP·Filed 2013·Granted Feb 14, 2017·4 cites·18 claims
- 0873US8358797B2Switch for a hearing aidINTRICON CORP·Filed 2009·Granted Jan 22, 2013·6 cites·9 claims
- 0967US10687157B2Head direction hearing assist switchingINTRICON CORP·Filed 2018·Granted Jun 16, 2020·1 cites·20 claims
- 1048US2005190939A1Method of manufacturing hearing aid ear tubeGN RESOUND NORTH AMERICA CORP·Filed 2005·Application pending·0 cites
- 1144USD424697SEartip for hearing aidRESOUND CORP·Filed 1998·Granted May 9, 2000·5 cites·1 claims
- 1244USD420135SPair of hearing aid tubesRESOUND CORP·Filed 1998·Granted Feb 1, 2000·5 cites·1 claims
- 1343USD420136SEartip for use as a hearing aidRESOUND CORP·Filed 1998·Granted Feb 1, 2000·5 cites·1 claims
- 1438US10499165B2Feedback reduction for high frequenciesINTRICON CORP·Filed 2017·Granted Dec 3, 2019·0 cites·24 claims
- 1538US2012237068A1Soft Concha Ring Behind-The-Ear Hearing AidFRETZ ROBERT J·Filed 2012·Application pending·0 cites
- 1632US2011075871A1Soft Concha Ring In-The-Ear Hearing AidINTRICON CORP·Filed 2010·Application pending·0 cites
- 1729USD671218SHearing aid bodyDAAVETTILA JEAN ELVIRA·Filed 2011·Granted Nov 20, 2012·2 cites·1 claims
- 1829US4730603AReceiver of amplitude modulated signalsMINNESOTA MINING & MFG·Filed 1987·Granted Mar 15, 1988·0 cites·20 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →