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in discharge-tube amplifiers

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  • CPC
  • H03F1/28
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Parent Industries

HELECTRICITY H03Electronic circuits H03FAMPLIFIERS H03F1/00Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements

Current Industry

H03F1/28in discharge-tube amplifiers
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Low voltage tube circuits
    • Patent number 11,128,262
    • Issue date Sep 21, 2021
    • Ronald Quan
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    Vacuum tube amplification system capable of reducing residual noise...
    • Patent number 11,121,678
    • Issue date Sep 14, 2021
    • ECHOWELL ELECTRONIC CO., LTD.
    • Hsi-Hsien Chen
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    Vacuum tube rear device
    • Patent number 10,755,885
    • Issue date Aug 25, 2020
    • ECHOWELL ELECTRONIC CO., LTD.
    • Hsi-Hsien Chen
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Grounding structure and grounding method of vacuum tube audio ampli...
    • Patent number 10,135,402
    • Issue date Nov 20, 2018
    • ECHOWELL ELECTRONICS CO., LTD.
    • Hsi-Hsien Chen
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    Noise reducer for microwave amplifier
    • Patent number 4,837,522
    • Issue date Jun 6, 1989
    • Thomson-CSF
    • Georges Fleury
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3641452
    • Patent number 3,641,452
    • Issue date Feb 8, 1972
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    3424994
    • Patent number 3,424,994
    • Issue date Jan 28, 1969
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    3378784
    • Patent number 3,378,784
    • Issue date Apr 16, 1968
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3375458
    • Patent number 3,375,458
    • Issue date Mar 26, 1968
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    3341786
    • Patent number 3,341,786
    • Issue date Sep 12, 1967
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    3314020
    • Patent number 3,314,020
    • Issue date Apr 11, 1967
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    3227962
    • Patent number 3,227,962
    • Issue date Jan 4, 1966
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    3207854
    • Patent number 3,207,854
    • Issue date Sep 21, 1965
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3203477
    • Patent number 3,203,477
    • Issue date Aug 31, 1965
    • F17 - STORING OF DISTRIBUTING GASES OR LIQUIDS
  • Information Patent Grant

    3090009
    • Patent number 3,090,009
    • Issue date May 14, 1963
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    3079569
    • Patent number 3,079,569
    • Issue date Feb 26, 1963
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    2970276
    • Patent number 2,970,276
    • Issue date Jan 31, 1961
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    2968768
    • Patent number 2,968,768
    • Issue date Jan 17, 1961
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    2968717
    • Patent number 2,968,717
    • Issue date Jan 17, 1961
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    2939918
    • Patent number 2,939,918
    • Issue date Jun 7, 1960
    • G01 - MEASURING TESTING
  • Information Patent Grant

    2932801
    • Patent number 2,932,801
    • Issue date Apr 12, 1960
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    2881265
    • Patent number 2,881,265
    • Issue date Apr 7, 1959
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2871290
    • Patent number 2,871,290
    • Issue date Jan 27, 1959
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2854531
    • Patent number 2,854,531
    • Issue date Sep 30, 1958
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    2810853
    • Patent number 2,810,853
    • Issue date Oct 22, 1957
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2799805
    • Patent number 2,799,805
    • Issue date Jul 16, 1957
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    2794850
    • Patent number 2,794,850
    • Issue date Jun 4, 1957
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2787787
    • Patent number 2,787,787
    • Issue date Apr 2, 1957
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2786100
    • Patent number 2,786,100
    • Issue date Mar 19, 1957
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2784257
    • Patent number 2,784,257
    • Issue date Mar 5, 1957
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

  • Information Patent Application

    VACUUM TUBE REAR DEVICE
    • Publication number 20190318898
    • Publication date Oct 17, 2019
    • ECHOWELL ELECTRONIC CO., LTD.
    • Hsi-Hsien CHEN
    • G01 - MEASURING TESTING
  • Information Patent Application

    Low Voltage Tube Circuits
    • Publication number 20190013782
    • Publication date Jan 10, 2019
    • Ronald Quan
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Application

    HIFI AUDIO TUBE AMPLIFIER
    • Publication number 20170085227
    • Publication date Mar 23, 2017
    • SENNHEISER ELECTRONIC GMBH & CO. KG
    • Dirk Krätzer
    • H03 - BASIC ELECTRONIC CIRCUITRY