Patents Assigned to Tsugaru Toshiba Sound Equipment Co., Ltd.
  • Patent number: 4972492
    Abstract: An earphone for use with audio reproduction devices. The earphone includes a housing, shaped to be retained in the concha cavity of the human ear, having an elongated portion shaped to fit between the tragus and antitragus of the ear, an audio transducer contained within the housing, a device for providing an electric signal to the audio transducer and a hollow tubular guide member attached to the housing such that when the elongated portion of the housing is inserted between the tragus and the antitragus of a human ear, the hollow tubular guide member extends into the external auditory meatus of the ear.
    Type: Grant
    Filed: March 14, 1989
    Date of Patent: November 20, 1990
    Assignees: Kabushiki Kaisha Toshiba, Tsugaru Toshiba Sound Equipment Co., Ltd.
    Inventors: Masamichi Tanaka, Kazuaki Kogure