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active element being vacuum tube

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  • H03B7/04
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HELECTRICITY H03Electronic circuits H03BGENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER GENERATION OF NOISE BY SUCH CIRCUITS H03B7/00Generation of oscillations using active element having a negative resistance between two of its electrodes

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H03B7/04active element being vacuum tube
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Patents Grantslast 30 patents

  • Information Patent Grant

    High frequency quasi optical power source capable of solid state im...
    • Patent number 7,403,076
    • Issue date Jul 22, 2008
    • HRL Laboratories, LLC
    • Jonathan J. Lynch
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    Crystal oscillator that utilizes the power transistor of an output...
    • Patent number 6,707,347
    • Issue date Mar 16, 2004
    • Nihon Dempa Kogyo, Co., Ltd.
    • Takeo Oita
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    Slab-elements for covering the ground
    • Patent number 4,128,357
    • Issue date Dec 5, 1978
    • Gunter Barth
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    3411109
    • Patent number 3,411,109
    • Issue date Nov 12, 1968
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    3202933
    • Patent number 3,202,933
    • Issue date Aug 24, 1965
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    2811640
    • Patent number 2,811,640
    • Issue date Oct 29, 1957
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    2535137
    • Patent number 2,535,137
    • Issue date Dec 26, 1950
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    2531426
    • Patent number 2,531,426
    • Issue date Nov 28, 1950
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    2520990
    • Patent number 2,520,990
    • Issue date Sep 5, 1950
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    2510111
    • Patent number 2,510,111
    • Issue date Jun 6, 1950
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    2492767
    • Patent number 2,492,767
    • Issue date Dec 27, 1949
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    2470732
    • Patent number 2,470,732
    • Issue date May 17, 1949
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    2396088
    • Patent number 2,396,088
    • Issue date Mar 5, 1946
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    2389004
    • Patent number 2,389,004
    • Issue date Nov 13, 1945
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    2332102
    • Patent number 2,332,102
    • Issue date Oct 19, 1943
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    2315658
    • Patent number 2,315,658
    • Issue date Apr 6, 1943
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    2311631
    • Patent number 2,311,631
    • Issue date Feb 23, 1943
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    2265397
    • Patent number 2,265,397
    • Issue date Dec 9, 1941
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    2260545
    • Patent number 2,260,545
    • Issue date Oct 28, 1941
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    2230097
    • Patent number 2,230,097
    • Issue date Jan 28, 1941
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    2226561
    • Patent number 2,226,561
    • Issue date Dec 31, 1940
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    2217748
    • Patent number 2,217,748
    • Issue date Oct 15, 1940
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    2144511
    • Patent number 2,144,511
    • Issue date Jan 17, 1939
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    2138896
    • Patent number 2,138,896
    • Issue date Dec 6, 1938
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    2119357
    • Patent number 2,119,357
    • Issue date May 31, 1938
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    2118414
    • Patent number 2,118,414
    • Issue date May 24, 1938
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    2093781
    • Patent number 2,093,781
    • Issue date Sep 21, 1937
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    2074465
    • Patent number 2,074,465
    • Issue date Mar 23, 1937
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    2067353
    • Patent number 2,067,353
    • Issue date Jan 12, 1937
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    2061733
    • Patent number 2,061,733
    • Issue date Nov 24, 1936
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents