Patents by Inventor Doi Hiroaki

Doi Hiroaki 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).

  • Laminates comprising prepregs metal clad
    Patent number: 4446191
    Abstract: A laminate produced by molding under heat and pressure a plurality of prepregs obtained by impregnating a resin into a composite fabric, either woven or nonwoven, comprising aromatic polyamide fibers and glass fibers has a low linear expansion coefficient and excellent interlaminar strength.
    Type: Grant
    Filed: October 23, 1981
    Date of Patent: May 1, 1984
    Assignees: Hitachi Chemical Company, Ltd., Hitachi, Ltd.
    Inventors: Yasuo Miyadera, Atsushi Fujioka, Tetsuo Kumazawa, Doi Hiroaki