Patents by Inventor Hideaki Hirosawa

Hideaki Hirosawa 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).

  • Safety helmet and a head protector therefor
    Patent number: 5867840
    Abstract: A head protector comprising an outer hard shell and an absorbing liner inside of the outer shell wherein the liner comprises a main liner member and an inner subsidiary liner member whose density is lower than that of the main liner member and with an inner recess in the inner surface of the main liner member and wherein the inner subsidiary liner member is fitted into the inner recess.
    Type: Grant
    Filed: October 30, 1996
    Date of Patent: February 9, 1999
    Assignee: Shoei Kako Co., Ltd.
    Inventors: Hideaki Hirosawa, Sakae Fujihira