Patents by Inventor Takeshi Iihara

Takeshi Iihara 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).

  • Noncontract IC tag with non-conductive metal film
    Patent number: 7651033
    Abstract: A noncontact IC tag 1 comprises a base film 11, a noncontact IC circuit 2, 3 formed on the base film 11, and a plastic film or paper serving as a surfacing sheet 4, having a non-conductive, lustrous metal film 6m formed by deposition, laminated to the base film 11 on the side of the noncontact IC tag circuit 2, 3. The surface roughness of the non-conductive, lustrous metal film 6m, determined by atomic force microscopy, is more than 10 nm and 100 nm or less as indicated by the center line average height Ra. In the case where the non-conductive, lustrous metal film 6m is formed on the outer surface of the surfacing sheet 4, a concealing layer 4a may further be formed on the inner surface of the surfacing sheet 4 in order to enhance concealing properties.
    Type: Grant
    Filed: November 27, 2006
    Date of Patent: January 26, 2010
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Hiroyuki Asakura, Kiyoshi Imaizumi, Takeshi Iihara, Kazuyuki Takasawa, Minoru Komada
  • Noncontact IC tag with non-conductive metal film
    Publication number: 20070138303
    Abstract: A noncontact IC tag 1 comprises a base film 11, a noncontact IC circuit 2, 3 formed on the base film 11, and a plastic film or paper serving as a surfacing sheet 4, having a non-conductive, lustrous metal film 6m formed by deposition, laminated to the base film 11 on the side of the noncontact IC tag circuit 2, 3. The surface roughness of the non-conductive, lustrous metal film 6m, determined by atomic force microscopy, is more than 10 nm and 100 nm or less as indicated by the center line average height Ra. In the case where the non-conductive, lustrous metal film 6m is formed on the outer surface of the surfacing sheet 4, a concealing layer 4a may further be formed on the inner surface of the surfacing sheet 4 in order to enhance concealing properties.
    Type: Application
    Filed: November 27, 2006
    Publication date: June 21, 2007
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Hiroyuki Asakura, Kiyoshi Imaizumi, Takeshi Iihara, Kazuyuki Takasawa, Minoru Komada