Inventor · disambiguated record
Matthew Polk
Also filed as: POLK JR MATTHEW S · POLK MATTHEW · POLK MATTHEW S · POLK MATTHEW S JR
32 granted patents·996 citations·filing 1977–2023
98Inventor score
Files withPOLK AUDIO INC7BRITANNIA INVEST CORP5POLK INVESTMENT CORP5JST POWER EQUIPMENT INC4CHLYSTEK THOMAS3
Top patents by PatentIndex Score
32 records- 0195US11860230B2Testing system that determines contact erosion in circuit breakerJST POWER EQUIPMENT INC·Filed 2021·Granted Jan 2, 2024·2 cites·32 claims
- 0295US7039212B2Weather resistant portingBRITANNIA INVEST CORP·Filed 2003·Granted May 2, 2006·181 cites·9 claims
- 0395US4569074AMethod and apparatus for reproducing sound having a realistic ambient field and acoustic imagePOLK AUDIO INC·Filed 1984·Granted Feb 4, 1986·96 cites·8 claims
- 0493US6937737B2Multi-channel audio surround sound from front located loudspeakersBRITANNIA INVEST CORP·Filed 2003·Granted Aug 30, 2005·58 cites·59 claims
- 0593US4497064AMethod and apparatus for reproducing sound having an expanded acoustic imagePOLK AUDIO INC·Filed 1982·Granted Jan 29, 1985·75 cites·23 claims
- 0693US4489432AMethod and apparatus for reproducing sound having a realistic ambient field and acoustic imagePOLK AUDIO INC·Filed 1982·Granted Dec 18, 1984·77 cites·14 claims
- 0789US7231053B2Enhanced multi-channel audio surround sound from front located loudspeakersBRITANNIA INVEST CORP·Filed 2005·Granted Jun 12, 2007·21 cites·15 claims
- 0884US10317373B2Direct field acoustic testing in a semi-reverberant enclosureMSI DFAT LLC·Filed 2013·Granted Jun 11, 2019·8 cites·18 claims
- 0983US7162049B2Ported loudspeaker system and method with reduced air turbulence, bipolar radiation pattern and novel appearanceBRITANNIA INVEST CORP·Filed 2003·Granted Jan 9, 2007·29 cites·31 claims
- 1082US12360163B2Testing system that determines contact erosion in circuit breakerJST POWER EQUIPMENT INC·Filed 2023·Granted Jul 15, 2025·0 cites·21 claims
- 1180US4759066ASound system with isolation of dimensional sub-speakersPOLK INVESTMENT CORP·Filed 1987·Granted Jul 19, 1988·42 cites·7 claims
- 1280USD251973SSpeaker cabinetKLOPFER GEORGE M·Filed 1977·Granted May 29, 1979·23 cites·1 claims
- 1379US7817812B2Compact audio reproduction system with large perceived acoustic size and imagePOLK AUDIO INC·Filed 2005·Granted Oct 19, 2010·9 cites·20 claims
- 1477US12106910B2Switchgear system that determines contact erosion in circuit breakerJST POWER EQUIPMENT INC·Filed 2023·Granted Oct 1, 2024·0 cites·20 claims
- 1577US4903300ACompact and efficient sub-woofer system and method for installation in structural partitionsPOLK INVESTMENT CORP·Filed 1989·Granted Feb 20, 1990·62 cites·22 claims
- 1675US6721434B2Loudspeaker mounting systemBRITANNIA INVEST CORP·Filed 2002·Granted Apr 13, 2004·31 cites·32 claims
- 1773US11804338B2Switchgear system that determines contact erosion in circuit breakerJST POWER EQUIPMENT INC·Filed 2021·Granted Oct 31, 2023·0 cites·23 claims
- 1873USD693375STractorCHLYSTEK THOMAS·Filed 2012·Granted Nov 12, 2013·18 cites·1 claims
- 1972USD693374STractorCHLYSTEK THOMAS·Filed 2012·Granted Nov 12, 2013·16 cites·1 claims
- 2071US10014959B2Standing wave reduction in direct field acoustic testingMSI DFAT LLC·Filed 2014·Granted Jul 3, 2018·4 cites·16 claims
- 2170US4630298AMethod and apparatus for reproducing sound having a realistic ambient field and acoustic imagePOLK MATTHEW S·Filed 1985·Granted Dec 16, 1986·33 cites·9 claims
- 2264US4638505AOptimized low frequency response of loudspeaker systems having main and sub-speakersPOLK AUDIO INC·Filed 1985·Granted Jan 20, 1987·38 cites·5 claims
- 2363US12411056B2High output acoustic system for direct field acoustic testingMSI DFAT LLC·Filed 2021·Granted Sep 9, 2025·0 cites·21 claims
- 2461US5517573APorted loudspeaker system and method with reduced air turbulencePOLK INVESTMENT CORP·Filed 1994·Granted May 14, 1996·36 cites·11 claims
- 2560USD350135SEnclosed speaker for vehicle usePOLK INVEST CORPORATION·Filed 1992·Granted Aug 30, 1994·11 cites·1 claims
- 2658US5809154APorted loudspeaker system and methodBRITANNIA INVESTMENT CORP·Filed 1995·Granted Sep 15, 1998·32 cites·5 claims
- 2752US4924963ACompact and efficient sub-woofer system and method for installation in structural partitionsPOLK INVESTMENT CORP·Filed 1989·Granted May 15, 1990·25 cites·21 claims
- 2852US4413162AMoving coil transducers using multiple-stranded coilsPOLK AUDIO INC·Filed 1982·Granted Nov 1, 1983·17 cites·2 claims
- 2951US4350847ASubwoofer system using a passive radiatorPOLK AUDIO INC·Filed 1981·Granted Sep 21, 1982·16 cites·5 claims
- 3050US5475764ABandpass woofer and methodPOLK INVESTMENT CORP·Filed 1994·Granted Dec 12, 1995·22 cites·22 claims
- 3144USD693376SCombined tractor front window and exhaustCHLYSTEK THOMAS·Filed 2012·Granted Nov 12, 2013·4 cites·1 claims
- 3239US4177431ALoudspeaker-cable interfacePOLK MATTHEW S JR·Filed 1978·Granted Dec 4, 1979·10 cites·9 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →