Patents by Inventor William Ballad

William Ballad 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).

  • Isolating deep canal fitting earphone
    Publication number: 20070217642
    Abstract: An insert earphone comprises a housing and at least one transducer that is located in the housing. The transducer is adapted to receive electrical energy and to responsively convert the electrical energy into acoustic energy for presentation to an eardrum of a user. The transducer is positioned within the housing so as to be in close proximity to the eardrum of the user when the housing is inserted into the ear canal. At least one sealing member is coupled to the housing. The at least one sealing member is adapted to provide an acoustic seal within the ear canal of the user.
    Type: Application
    Filed: March 2, 2006
    Publication date: September 20, 2007
    Inventors: Timothy Wickstrom, William Ballad, David Schaefer