Gramophone pick-ups using a stylus Recorders using a stylus

Patents Grantslast 30 patents

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    3691316

    • Patent number 3,691,316
    • Issue date Sep 12, 1972
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
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    3673354

    • Patent number 3,673,354
    • Issue date Jun 27, 1972
    • G01 - MEASURING TESTING
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    3501732

    • Patent number 3,501,732
    • Issue date Mar 17, 1970
    • G01 - MEASURING TESTING
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    3475565

    • Patent number 3,475,565
    • Issue date Oct 28, 1969
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
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    3392358

    • Patent number 3,392,358
    • Issue date Jul 9, 1968
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    3378648

    • Patent number 3,378,648
    • Issue date Apr 16, 1968
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
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    3295085

    • Patent number 3,295,085
    • Issue date Dec 27, 1966
    • G01 - MEASURING TESTING
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    3182492

    • Patent number 3,182,492
    • Issue date May 11, 1965
    • G01 - MEASURING TESTING
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    3138850

    • Patent number 3,138,850
    • Issue date Jun 30, 1964
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
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    2786898

    • Patent number 2,786,898
    • Issue date Mar 26, 1957
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    2769038

    • Patent number 2,769,038
    • Issue date Oct 30, 1956
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
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    2711446

    • Patent number 2,711,446
    • Issue date Jun 21, 1955
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    2711447

    • Patent number 2,711,447
    • Issue date Jun 21, 1955
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    2703822

    • Patent number 2,703,822
    • Issue date Mar 8, 1955
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
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    2671153

    • Patent number 2,671,153
    • Issue date Mar 2, 1954
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    2648726

    • Patent number 2,648,726
    • Issue date Aug 11, 1953
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    2645683

    • Patent number 2,645,683
    • Issue date Jul 14, 1953
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    2590439

    • Patent number 2,590,439
    • Issue date Mar 25, 1952
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    2568673

    • Patent number 2,568,673
    • Issue date Sep 18, 1951
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    2545737

    • Patent number 2,545,737
    • Issue date Mar 20, 1951
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    2511664

    • Patent number 2,511,664
    • Issue date Jun 13, 1950
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    2511665

    • Patent number 2,511,665
    • Issue date Jun 13, 1950
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    2491794

    • Patent number 2,491,794
    • Issue date Dec 20, 1949
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    2482467

    • Patent number 2,482,467
    • Issue date Sep 20, 1949
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    2476848

    • Patent number 2,476,848
    • Issue date Jul 19, 1949
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    2472770

    • Patent number 2,472,770
    • Issue date Jun 7, 1949
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    2471601

    • Patent number 2,471,601
    • Issue date May 31, 1949
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    2429137

    • Patent number 2,429,137
    • Issue date Oct 14, 1947
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    2415403

    • Patent number 2,415,403
    • Issue date Feb 11, 1947
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    2382692

    • Patent number 2,382,692
    • Issue date Aug 14, 1945
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents