TREA

Erling Frederiksen

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  • Holte, DK
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Patents Grantslast 30 patents

  • Information Patent Grant

    Method and a system for testing capacitive, acoustic transducers
    • Patent number 5,400,297
    • Issue date Mar 21, 1995
    • A/S Bruel & Kjaer
    • Erling Frederiksen
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Probe microphone
    • Patent number 5,136,656
    • Issue date Aug 4, 1992
    • Aktieselskabet Bruel & Kjaer
    • Erling Frederiksen
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Pressure gradient microphone
    • Patent number 4,887,300
    • Issue date Dec 12, 1989
    • Aktieselskabet Bruel & Kjaer
    • Frederiksen Erling
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Dual cavity pressure microphones
    • Patent number 4,777,650
    • Issue date Oct 11, 1988
    • A/S Bruel & Kjar
    • Erling Frederiksen
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Acoustic calibration device
    • Patent number 4,715,219
    • Issue date Dec 29, 1987
    • Aktieselskabet Bruel & Kajaer
    • Erling Frederiksen
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Capacitive transducer
    • Patent number 4,582,961
    • Issue date Apr 15, 1986
    • Aktieselskabet Bruel & Kjar
    • Erling Frederiksen
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE