Patents by Inventor Shigeru Nakagami

Shigeru Nakagami 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).

  • Thermal recording medium
    Patent number: 5294587
    Abstract: A thermal recording medium good in recording sensitivity and recording stability comprising a metal thin layer, a heat sensitive softening layer placed in contact with said metal thin layer, a contrasting layer placed in contact with said heat sensitive softening layer or said metal thin layer and having a visual contrast to said metal thin layer, and a heat sensitive color forming layer placed in contact with said heat sensitive softening layer or said metal thin layer on the side of said metal thin layer opposite to the side where the contrasting layer is positioned.
    Type: Grant
    Filed: September 17, 1990
    Date of Patent: March 15, 1994
    Assignee: Kyodo Printing Co., Ltd.
    Inventors: Shigeru Nakagami, Haruhiko Ohsawa, Yutaka Takagi, Tadahide Sugimoto, Minoru Fujita, Yoshihiko Nakahara