Patents Examined by Ngâm V. Ngô
  • Electrostatic electroacoustical transducer
    Patent number: 6753583
    Abstract: An electrostatic electroacoustical transducer contains an electrically conductive fixed electrode plate having an active surface with recesses. A conductive or semiconductive flexible diaphragm is disposed at a distance from the active surface of the electrode plate and within the recesses. An insulating device is disposed between the electrode plate and the diaphragm.
    Type: Grant
    Filed: February 24, 2003
    Date of Patent: June 22, 2004
    Assignee: Fachhochschule
    Inventors: Axel Stoffel, Zdenek Skvor