Patents by Inventor Ichimatsu Kishimoto

Ichimatsu Kishimoto 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).

  • Reconstituted mica acoustic diaphragm
    Patent number: 4026384
    Abstract: An acoustic diaphragm composed essentially of a flat, cone-like or dome-like reconstituted mica paper of fine scaly mica flakes and an organic polymeric binder impregnated in the mica paper. The diaphragm has a density of 1.3 to 2.3 g/cm.sup.3 and a Young's modulus of 6 .times. 10.sup.10 to 3 .times. 10.sup.12 dyne/cm.sup.2.
    Type: Grant
    Filed: November 24, 1975
    Date of Patent: May 31, 1977
    Assignee: Okabe Mica Co., Ltd.
    Inventors: Kenzabro Yamachika, Ituro Sonoda, Ichimatsu Kishimoto, Masaaki Matsushima