Inventor · disambiguated record
Russell J. Apfel
Also filed as: APFEL RUSSELL · APFEL RUSSELL J · APFEL RUSSELL JAY
44 granted patents·11 pending applications·781 citations·filing 1980–2019
98Inventor score
Files withSILICON LAB INC17ADVANCED MICRO DEVICES INC9APFEL RUSSELL J9LEGERITY INC7III HOLDINGS 4 LLC5
Top patents by PatentIndex Score
55 records- 0197US8761421B2Portable electronic device and computer-readable medium for remote hearing aid profile storageAPFEL RUSSELL J·Filed 2011·Granted Jun 24, 2014·57 cites·17 claims
- 0295US8831244B2Portable tone generator for producing pre-calibrated tonesAPFEL RUSSELL J·Filed 2011·Granted Sep 9, 2014·166 cites·20 claims
- 0393US9071917B2Hearing aid and hearing aid dual use dongleAUDIOTONIQ INC·Filed 2012·Granted Jun 30, 2015·15 cites·13 claims
- 0491US10462582B2Hearing aid and hearing aid dual use dongleIII HOLDINGS 4 LLC·Filed 2016·Granted Oct 29, 2019·6 cites·18 claims
- 0591US8649538B2Hearing aid having multiple sound inputs and methods thereforAPFEL RUSSELL J·Filed 2011·Granted Feb 11, 2014·20 cites·7 claims
- 0691US8064179B2Integrated circuit including a switching regulator design for power over Ethernet devicesAPFEL RUSSELL J·Filed 2006·Granted Nov 22, 2011·27 cites·18 claims
- 0789US8538049B2Hearing aid, computing device, and method for selecting a hearing aid profileAPFEL RUSSELL J·Filed 2011·Granted Sep 17, 2013·12 cites·16 claims
- 0889US8261104B2System and method of classification in power over ethernet systemsLANDRY D MATTHEW·Filed 2009·Granted Sep 4, 2012·16 cites·22 claims
- 0988US7793124B2System and method of classification in power over ethernet systemsSILICON LAB INC·Filed 2007·Granted Sep 7, 2010·13 cites·22 claims
- 1086US7516340B2Powered device including a classification signature resistorSILICON LAB INC·Filed 2006·Granted Apr 7, 2009·15 cites·20 claims
- 1184US5737411ABattery switching in a telephone subscriber line interface circuitADVANCED MICRO DEVICES INC·Filed 1994·Granted Apr 7, 1998·104 cites·22 claims
- 1283US7548799B2Powered device including a detection signature resistorSILICON LAB INC·Filed 2006·Granted Jun 16, 2009·11 cites·19 claims
- 1383US7511930B2System and method for high voltage protection of powered devicesSILICON LAB INC·Filed 2006·Granted Mar 31, 2009·10 cites·27 claims
- 1481US4315207ACurrent controlled battery feed circuitADVANCED MICRO DEVICES INC·Filed 1980·Granted Feb 9, 1982·33 cites·16 claims
- 1580US7647510B2System and method of classification in power over ethernet systemsSILICON LAB INC·Filed 2006·Granted Jan 12, 2010·6 cites·21 claims
- 1680US4359609ACircuit with feedback for controlling the impedance thereofADVANCED MICRO DEVICES INC·Filed 1980·Granted Nov 16, 1982·32 cites·38 claims
- 1778US8792661B2Hearing aids, computing devices, and methods for hearing aid profile updateAPFEL RUSSELL J·Filed 2011·Granted Jul 29, 2014·10 cites·20 claims
- 1878US7960860B2Power sourcing equipment device including a serial interfaceSILICON LAB INC·Filed 2010·Granted Jun 14, 2011·5 cites·20 claims
- 1977US5694465AIntegrated ringer for short telephone linesADVANCED MICRO DEVICES INC·Filed 1995·Granted Dec 2, 1997·59 cites·28 claims
- 2076US7964992B2Circuit device including multiple parameterized power regulatorsSILICON LAB INC·Filed 2008·Granted Jun 21, 2011·12 cites·29 claims
- 2174USRE47063EHearing aid, computing device, and method for selecting a hearing aid profileIII HOLDINGS 4 LLC·Filed 2015·Granted Sep 25, 2018·2 cites·31 claims
- 2274US9413174B2I-V measurement system for photovoltaic modulesGOSTEIN MICHAEL·Filed 2010·Granted Aug 9, 2016·3 cites·34 claims
- 2371US4563548AMethod and circuit for telephone dialing signal generationADVANCED MICRO DEVICES INC·Filed 1984·Granted Jan 7, 1986·23 cites·29 claims
- 2470US7113590B2Method and apparatus for a differential feedback in an active impedence feedback circuitLEGERITY INC·Filed 2003·Granted Sep 26, 2006·10 cites·28 claims
- 2569US9503825B2Hearing aid and hearing aid dual use dongleIII HOLDINGS 4 LLC·Filed 2015·Granted Nov 22, 2016·1 cites·20 claims
- 2667US7773354B2Voltage protection circuit for power supply device and method thereforSILICON LAB INC·Filed 2006·Granted Aug 10, 2010·3 cites·24 claims
- 2766US5619567AVariable DC feed characteristic in a subscriber line interface circuitADVANCED MICRO DEVICES INC·Filed 1994·Granted Apr 8, 1997·41 cites·19 claims
- 2865US8375231B2System and method of classification in power over ethernet systemsSILISON LAB INC·Filed 2010·Granted Feb 12, 2013·2 cites·20 claims
- 2965US7477095B2Current mirror architecturesSILICON LAB INC·Filed 2006·Granted Jan 13, 2009·5 cites·23 claims
- 3065US6956945B2Method and apparatus for phantom battery feedLEGERITY INC·Filed 2003·Granted Oct 18, 2005·9 cites·26 claims
- 3164US9065657B2Powered device including a detection signature circuitAPFEL RUSSELL J·Filed 2006·Granted Jun 23, 2015·2 cites·21 claims
- 3263US2020037083A1Hearing aid and hearing aid dual use dongleIII HOLDINGS 4 LLC·Filed 2019·Application pending·0 cites
- 3363US2020021922A1Hearing aid and hearing aid dual use dongleIII HOLDINGS4 LLC·Filed 2019·Application pending·0 cites
- 3459US7254229B2Method and apparatus for an active impedance feedbackLEGERITY INC·Filed 2003·Granted Aug 7, 2007·3 cites·30 claims
- 3557US7215764B2Current sensing echo cancellation deviceLEGERITY INC·Filed 2002·Granted May 8, 2007·4 cites·46 claims
- 3655US7970125B2Output stacking architecture for an amplifierSILICON LAB INC·Filed 2006·Granted Jun 28, 2011·3 cites·13 claims
- 3754US7791221B2Power sourcing equipment device including a serial interfaceSILICON LAB INC·Filed 2008·Granted Sep 7, 2010·1 cites·20 claims
- 3854US2013177188A1System and method for remote hearing aid adjustment and hearing testing by a hearing health professionalAUDIOTONIQ INC·Filed 2012·Application pending·0 cites
- 3953US8019077B2Methods and apparatus for low voltage control of a subscriber line interface circuitSILICON LAB INC·Filed 2006·Granted Sep 13, 2011·0 cites·21 claims
- 4052US6351528B1Integrated ringer for short telephone linesADVANCED MICRO DEVICES INC·Filed 1999·Granted Feb 26, 2002·14 cites·28 claims
- 4151US8249247B2Tracking voltage regulator for a subscriber line interface circuitAPFEL RUSSELL J·Filed 2006·Granted Aug 21, 2012·0 cites·15 claims
- 4251US2016204737A1I-v measurement system for photovoltaic modulesATONOMETRICS INC·Filed 2016·Application pending·0 cites
- 4350US7260210B2Unbalanced slic with a built-in ring circuitLEGERITY INC·Filed 2003·Granted Aug 21, 2007·0 cites·39 claims
- 4449US7181002B2Method and apparatus for a single power supply for dual power modeLEGERITY INC·Filed 2003·Granted Feb 20, 2007·0 cites·23 claims
- 4549US6356624B1Method and apparatus for detecting and measuring foreign voltagesLEGERITY INC·Filed 1998·Granted Mar 12, 2002·17 cites·25 claims
- 4647US2018115841A1System and method for remote hearing aid adjustment and hearing testing by a hearing health professionalIII HOLDINGS 4 LLC·Filed 2017·Application pending·0 cites
- 4747US2010007334A1Power sourcing equipment device and method of providing a power supply to a powered deviceSILICON LAB INC·Filed 2008·Application pending·0 cites
- 4847US2007291929A1Methods and apparatus for performing subscriber line interface functionsAPFEL RUSSELL J·Filed 2006·Application pending·0 cites
- 4946US2007263332A1System and method for high voltage protection of powered devicesSILICON LAB INC·Filed 2006·Application pending·0 cites
- 5044US2002106072A1Method and apparatus for improving gain bandwidth pathsFiled 2001·Application pending·0 cites
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