Patents by Inventor Masaheko Tamura

Masaheko Tamura 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).

  • Mounting for flexible diaphragm piezoelectric transducer
    Patent number: 3997804
    Abstract: A piezoelectric electro-acoustic transducer which includes a support means, a piezoelectric diaphragm supported at its edge portions by the support means comprising at least a pair of fixing members arranged to oppose each other, and a resilient backing member brought into a contact with the diaphragm to impart to the diaphragm a suitable tension and/or resiliency. The resilient backing member has an area smaller than the substantial vibration area of the diaphragm so that portions of the diaphragm are left free from contact with the resilient backing member, whereby, it has become possible to improve the frequency characteristics and consequently obtain improved sound characteristics.
    Type: Grant
    Filed: February 12, 1975
    Date of Patent: December 14, 1976
    Assignee: Pioneer Electronic Corporation
    Inventors: Masaheko Tamura, Kiyononi Iwama, Toshikagu Yoshimi