Patents by Inventor Kazuhiro Handa

Kazuhiro Handa 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).

  • Scratch color-developable ink and invisible information printed sheet
    Patent number: 8283285
    Abstract: Disclosed are a scratch color-developable ink comprising an electron-donating colorless or light-color dye precursor, an electron-accepting color developer and a varnish, wherein a solid particle component contained therein has an average particle diameter of 0.3 to 25 ?m, a scratch color-developable ink comprising an electron-donating colorless or light-color dye precursor, an electron-accepting color developer and a varnish, wherein an azaphthalide compound is contained as the electron-donating colorless or light-color dye precursor, and an invisible information printed sheet obtained by printing invisible information on a support with the above scratch color-developable ink.
    Type: Grant
    Filed: December 19, 2007
    Date of Patent: October 9, 2012
    Assignees: Mitsubishi Paper Mills Limited, Tokyo Printing Ink Mfg. Co., Ltd.
    Inventors: Hisashi Wakasugi, Fujio Takasaki, Kazuhiro Handa, Masahiro Miyauchi, Haruhiko Ikeda
  • SCRATCH COLOR-DEVELOPABLE INK AND INVISIBLE INFORMATION PRINTED SHEET
    Publication number: 20100021702
    Abstract: Disclosed are a scratch color-developable ink comprising an electron-donating colorless or light-color dye precursor, an electron-accepting color developer and a varnish, wherein a solid particle component contained therein has an average particle diameter of 0.3 to 25 ?m, a scratch color-developable ink comprising an electron-donating colorless or light-color dye precursor, an electron-accepting color developer and a varnish, wherein an azaphthalide compound is contained as the electron-donating colorless or light-color dye precursor, and an invisible information printed sheet obtained by printing invisible information on a support with the above scratch color-developable ink.
    Type: Application
    Filed: December 19, 2007
    Publication date: January 28, 2010
    Applicant: MITSUBISHI PAPER INK MFG. CO., LTD.
    Inventors: Hisashi Wakasugi, Fujio Takasaki, Kazuhiro Handa, Masahiro Miyauchi, Haruhiko Ikeda