Patents by Inventor Takae Shinagawa

Takae Shinagawa 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).

  • Reversible heat-senitive recording material and magnetic card using the recording material
    Patent number: 5229350
    Abstract: A reversible heat-sensitive recording material, a method of recording and erasing information using the recording material, and a magnetic card using the recording material, the recording material comprising a reversible heat-sensitive recording material comprising a heat-sensitive layer containing a resin matrix and an organic low molecular weight material, said organic low molecular weight material containing at least one higher fatty acid having 16 or more carbon atoms and a sulfide represented by the formulaHOOC(CH.sub.2).sub.m --S--(CH.sub.2).sub.n COOH [I]wherein m and n each independently means an integer of 1 to 5, the ratio of the amount of said at least one higher fatty acid to that of said sulfide being from 90:10 to 10:90 by weight.
    Type: Grant
    Filed: July 18, 1991
    Date of Patent: July 20, 1993
    Assignee: Nitto Denko Corporation
    Inventors: Takae Shinagawa, Yoshihiro Hieda, Megumi Ashida, Yoshinori Yoshida, Yasushi Inoue