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Variable filter
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Patent number 10,879,875
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Issue date Dec 29, 2020
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Anlotek Limited
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Jorgen Staal Nielsen
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H03 - BASIC ELECTRONIC CIRCUITRY
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Variable filter
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Patent number 10,050,604
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Issue date Aug 14, 2018
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Aniotek Limited
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Jorgen Staal Nielsen
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H03 - BASIC ELECTRONIC CIRCUITRY
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Filter circuit
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Patent number 8,686,788
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Issue date Apr 1, 2014
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Smartcom Bulgaria AD
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Ivan Stefanov Uzunov
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H03 - BASIC ELECTRONIC CIRCUITRY
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Combined crystal and LC filter
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Patent number 5,543,756
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Issue date Aug 6, 1996
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Hewlett-Packard Company
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Thomas H. Anderson
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H03 - BASIC ELECTRONIC CIRCUITRY
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Record player
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Patent number 4,358,842
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Issue date Nov 9, 1982
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Sony Corporation
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Shuichi Kimura
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G11 - INFORMATION STORAGE
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3754192
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Patent number 3,754,192
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Issue date Aug 21, 1973
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H03 - BASIC ELECTRONIC CIRCUITRY
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3568007
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Patent number 3,568,007
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Issue date Mar 2, 1971
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H03 - BASIC ELECTRONIC CIRCUITRY
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3221265
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Patent number 3,221,265
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Issue date Nov 30, 1965
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H03 - BASIC ELECTRONIC CIRCUITRY
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3170120
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Patent number 3,170,120
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Issue date Feb 16, 1965
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G01 - MEASURING TESTING