using at least two tubes so coupled that the input of one is derived from the output of another

Patents Grantslast 30 patents

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    3801866

    • Patent number 3,801,866
    • Issue date Apr 2, 1974
    • H03 - BASIC ELECTRONIC CIRCUITRY
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    2898587

    • Patent number 2,898,587
    • Issue date Aug 4, 1959
    • G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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    2889457

    • Patent number 2,889,457
    • Issue date Jun 2, 1959
    • H03 - BASIC ELECTRONIC CIRCUITRY
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    2853609

    • Patent number 2,853,609
    • Issue date Sep 23, 1958
    • H03 - BASIC ELECTRONIC CIRCUITRY
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    2842666

    • Patent number 2,842,666
    • Issue date Jul 8, 1958
    • H03 - BASIC ELECTRONIC CIRCUITRY
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    2802107

    • Patent number 2,802,107
    • Issue date Aug 6, 1957
    • H03 - BASIC ELECTRONIC CIRCUITRY
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    2741698

    • Patent number 2,741,698
    • Issue date Apr 10, 1956
    • H03 - BASIC ELECTRONIC CIRCUITRY
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    2659816

    • Patent number 2,659,816
    • Issue date Nov 17, 1953
    • H03 - BASIC ELECTRONIC CIRCUITRY
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    2647208

    • Patent number 2,647,208
    • Issue date Jul 28, 1953
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
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    2624044

    • Patent number 2,624,044
    • Issue date Dec 30, 1952
    • G01 - MEASURING TESTING
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    2614222

    • Patent number 2,614,222
    • Issue date Oct 14, 1952
    • H03 - BASIC ELECTRONIC CIRCUITRY
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    • Patent number 2,609,508
    • Issue date Sep 2, 1952
    • H03 - BASIC ELECTRONIC CIRCUITRY
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    2591940

    • Patent number 2,591,940
    • Issue date Apr 8, 1952
    • H03 - BASIC ELECTRONIC CIRCUITRY
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    2589240

    • Patent number 2,589,240
    • Issue date Mar 18, 1952
    • H03 - BASIC ELECTRONIC CIRCUITRY
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    2586409

    • Patent number 2,586,409
    • Issue date Feb 19, 1952
    • C07 - ORGANIC CHEMISTRY
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    2573447

    • Patent number 2,573,447
    • Issue date Oct 30, 1951
    • H03 - BASIC ELECTRONIC CIRCUITRY
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    2572698

    • Patent number 2,572,698
    • Issue date Oct 23, 1951
    • H03 - BASIC ELECTRONIC CIRCUITRY
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    2567851

    • Patent number 2,567,851
    • Issue date Sep 11, 1951
    • H03 - BASIC ELECTRONIC CIRCUITRY
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    2526003

    • Patent number 2,526,003
    • Issue date Oct 17, 1950
    • H03 - BASIC ELECTRONIC CIRCUITRY
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    2521726

    • Patent number 2,521,726
    • Issue date Sep 12, 1950
    • H03 - BASIC ELECTRONIC CIRCUITRY
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    2510167

    • Patent number 2,510,167
    • Issue date Jun 6, 1950
    • H03 - BASIC ELECTRONIC CIRCUITRY
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    2502687

    • Patent number 2,502,687
    • Issue date Apr 4, 1950
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
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    2501620

    • Patent number 2,501,620
    • Issue date Mar 21, 1950
    • H03 - BASIC ELECTRONIC CIRCUITRY
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    2484611

    • Patent number 2,484,611
    • Issue date Oct 11, 1949
    • H03 - BASIC ELECTRONIC CIRCUITRY
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    2438638

    • Patent number 2,438,638
    • Issue date Mar 30, 1948
    • H03 - BASIC ELECTRONIC CIRCUITRY
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    2436808

    • Patent number 2,436,808
    • Issue date Mar 2, 1948
    • H03 - BASIC ELECTRONIC CIRCUITRY
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    2416513

    • Patent number 2,416,513
    • Issue date Feb 25, 1947
    • H03 - BASIC ELECTRONIC CIRCUITRY
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    2365512

    • Patent number 2,365,512
    • Issue date Dec 19, 1944
    • H03 - BASIC ELECTRONIC CIRCUITRY
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    • Patent number 2,365,583
    • Issue date Dec 19, 1944
    • H03 - BASIC ELECTRONIC CIRCUITRY
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    2338395

    • Patent number 2,338,395
    • Issue date Jan 4, 1944
    • H03 - BASIC ELECTRONIC CIRCUITRY