TREA

using different frequency bands for transmitting and receiving paths ; using phase shifting arrangements

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Industry

  • CPC
  • H04M9/087
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Parent Industries

HELECTRICITY H04Electric communication H04MTELEPHONIC COMMUNICATION H04M9/00Interconnection arrangements not involving centralised switching

Current Industry

H04M9/087using different frequency bands for transmitting and receiving paths ; using phase shifting arrangements
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Patents Grantslast 30 patents

  • Information Patent Grant

    Receive-path signal gain operations
    • Patent number 11,363,147
    • Issue date Jun 14, 2022
    • SORENSON IP HOLDINGS, LLC
    • Mark Adams
    • G10 - MUSICAL INSTRUMENTS ACOUSTICS
  • Information Patent Grant

    Echo canceller device and voice telecommunications device
    • Patent number 10,367,949
    • Issue date Jul 30, 2019
    • Mitsubishi Electric Corporation
    • Tomoharu Awano
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Communication device with echo suppression
    • Patent number 9,819,805
    • Issue date Nov 14, 2017
    • SENNHEISER COMMUNICATIONS A/S
    • Svend Feldt
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Noise reduction circuit for telephones
    • Patent number 6,798,881
    • Issue date Sep 28, 2004
    • Acoustic Technologies, Inc.
    • Samuel L. Thomasson
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Audio processing system for point-to-point and multipoint teleconfe...
    • Patent number 5,434,912
    • Issue date Jul 18, 1995
    • Bell Communications Research, Inc.
    • David G. Boyer
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Audio processing system for teleconferencing with high and low tran...
    • Patent number 5,386,465
    • Issue date Jan 31, 1995
    • Bell Communications Research, Inc.
    • Eric J. Addeo
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Audio processing system for teleconferencing system
    • Patent number 5,271,057
    • Issue date Dec 14, 1993
    • Bell Communications Research, Inc.
    • Eric J. Addeo
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Voice enhancer system
    • Patent number 4,965,833
    • Issue date Oct 23, 1990
    • Thomas McGregor
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Apparatus and method for hands free telephonic communication
    • Patent number 4,819,263
    • Issue date Apr 4, 1989
    • Cellular Communications Corporation
    • Philip G. Franklin
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Loudspeaking telephone instrument
    • Patent number 4,748,663
    • Issue date May 31, 1988
    • U.S. Philips Corp.
    • Ian Phillips
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Method and system for reducing conference bridge oscillations
    • Patent number 4,253,000
    • Issue date Feb 24, 1981
    • Rolm Corporation
    • James M. Kasson
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3794766
    • Patent number 3,794,766
    • Issue date Feb 26, 1974
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3784747
    • Patent number 3,784,747
    • Issue date Jan 8, 1974
    • G10 - MUSICAL INSTRUMENTS ACOUSTICS
  • Information Patent Grant

    3622714
    • Patent number 3,622,714
    • Issue date Nov 23, 1971
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3588352
    • Patent number 3,588,352
    • Issue date Jun 28, 1971
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3585311
    • Patent number 3,585,311
    • Issue date Jun 15, 1971
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3217561
    • Patent number 3,217,561
    • Issue date Nov 16, 1965
    • B07 - SEPARATING SOLIDS FROM SOLIDS SORTING
  • Information Patent Grant

    3183304
    • Patent number 3,183,304
    • Issue date May 11, 1965
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2759999
    • Patent number 2,759,999
    • Issue date Aug 21, 1956
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2606252
    • Patent number 2,606,252
    • Issue date Aug 5, 1952
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents