Patents by Inventor Tadazumi Hashimoto

Tadazumi Hashimoto 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).

  • Loudspeaker diaphragm
    Publication number: 20030002695
    Abstract: A loudspeaker diaphragm which is light in weight (low in density), good in environmental resistance, high in internal loss, easy to form, and high in degree of flexibility in designing its shape is provided. A polyimide foam material which has been molded into a block of foam having a predetermined thickness is heated and pressed by a die into a loudspeaker diaphragm made of the polyimide foam material.
    Type: Application
    Filed: June 14, 2002
    Publication date: January 2, 2003
    Applicant: Pioneer Corporation
    Inventors: Masanori Takahashi, Tadazumi Hashimoto