Patents by Inventor Michael A. Ketchell

Michael A. Ketchell 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).

  • Speaker motor and speaker
    Patent number: 8175321
    Abstract: A diaphragm for a speaker includes two portions. The first portion is made of metallic material for producing a high frequency tone. The second portion is made of a non-metallic material for producing a low frequency tone. The first portion is joined at a first peripheral edge to a voice coil while a second peripheral edge is joined at a first peripheral edge of the second portion to form the diaphragm.
    Type: Grant
    Filed: January 12, 2007
    Date of Patent: May 8, 2012
    Assignee: Samson Technologies Corporation
    Inventors: Douglas Bryant, Michael A. Ketchell
  • SPEAKER MOTOR AND SPEAKER
    Publication number: 20100092023
    Abstract: A diaphragm for a speaker includes two portions. The first portion is made of metallic material for producing a high frequency tone. The second portion is made of a non-metallic material for producing a low frequency tone. The first portion is joined at a first peripheral edge to a voice coil while a second peripheral edge is joined at a first peripheral edge of the second portion to form the diaphragm.
    Type: Application
    Filed: January 12, 2007
    Publication date: April 15, 2010
    Applicant: SAMSON TECHNOLOGIES CORPORATION
    Inventors: Douglas Bryant, Michael A. Ketchell