Patents by Inventor Alan P. Woodard

Alan P. Woodard 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).

  • Microphone acoustical polar pattern converter
    Patent number: 4862507
    Abstract: A microphone acoustical polar pattern converter conveniently converts the acoustical polar pattern of a microphone from cardioid to supercardioid and back at will. The converter includes primarily a body of a tubular body portion fitted forward of the microphone head. Most preferably, the body is formed of open pore plastic, with a pore size of 70 microns.
    Type: Grant
    Filed: January 16, 1987
    Date of Patent: August 29, 1989
    Assignee: Shure Brothers, Inc.
    Inventor: Alan P. Woodard
  • Unidirectional condenser microphone
    Patent number: 3963881
    Abstract: A miniature unidirectional condenser microphone includes a diaphragm dividing a housing into first and second chambers. Each chamber communicates through a sound inlet port to the atmosphere. One of the sound inlet ports is covered by a sheet of porous, non-absorbent, hydrophobic thermoplastic material forming an acoustical resistance.
    Type: Grant
    Filed: May 29, 1973
    Date of Patent: June 15, 1976
    Assignee: Thermo Electron Corporation
    Inventors: Freeman W. Fraim, Preston V. Murphy, Alan P. Woodard