Patents by Inventor Hikotaro Kawaguchi

Hikotaro Kawaguchi 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).

  • Water absorbing sheet assembly
    Patent number: 4414255
    Abstract: A water-absorbing sheet assembly comprises two sheets, at least one of which is a water-permeable sheet, and a polymeric absorbent inserted between said two sheets, wherein at least a part of said two sheets are pressed and bonded to each other.
    Type: Grant
    Filed: April 18, 1980
    Date of Patent: November 8, 1983
    Assignee: Kao Soap Co., Ltd.
    Inventors: Mitsuru Tokuyama, Yoshimi Tsuchiya, Hikotaro Kawaguchi, Masayuki Sagae, Kenji Ohki