Patents by Inventor Bruce Bartlett

Bruce Bartlett has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Directional microphone with acoustic washer
    Patent number: 4694499
    Abstract: A directional microphone having an acoustic damping washer positioned about the microphone cartridge adjacent the microphone rear sound entry.
    Type: Grant
    Filed: February 13, 1985
    Date of Patent: September 15, 1987
    Assignee: Crown International, Inc.
    Inventor: Bruce Bartlett
  • Differential microphone
    Patent number: 4633045
    Abstract: A differential microphone which includes a plate positioned between and spanning the sound-receiving opening of the microphone. Carried by the plate is a transducer having opposed sound entries surrounded by one or more bores which extend through the plate. The plate serves to delay sound reception at one transducer sound entry.
    Type: Grant
    Filed: February 13, 1985
    Date of Patent: December 30, 1986
    Assignee: Crown International, Inc.
    Inventor: Bruce Bartlett
  • Microphone windscreen
    Patent number: 4625827
    Abstract: A unidirectional microphone windscreen which includes portions formed of compressed foam and uncompressed foam located on opposite sides of the capsule to enhance directivity of the microphone.
    Type: Grant
    Filed: October 16, 1985
    Date of Patent: December 2, 1986
    Assignee: Crown International, Inc.
    Inventor: Bruce Bartlett