Patents by Inventor Shinitsu Kinoshita

Shinitsu Kinoshita 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).

  • Optical recording medium
    Patent number: 6054199
    Abstract: A high density optical recording medium having wide-width grooves capable of reliable tracking is provided. The optical recording medium is formed with the wide-width grooves 12 in which a width g of the groove 12 is larger than a width L of a land between the grooves. The lands 11 and the grooves 12 are formed so that a track pitch Tp is less than 1 .mu.m, and a land height h from a groove bottom surface 13 satisfies [(.lambda./(8n)).multidot.Ltan.theta.]/[Ltan.theta.-(.lambda./(8n))].ltore q.h.ltoreq.[(.lambda./(5n)).multidot.Ltan.theta.]/[Ltan.theta.-(.lambda./(5 n))] with respect to a wavelength .lambda. of a reproducing light beam and a refractive index n of a substrate. An angle of inclination of a groove side wall is represented by .theta., and the refractive index of the substrate is represented by n.
    Type: Grant
    Filed: February 8, 1999
    Date of Patent: April 25, 2000
    Assignees: Hitachi Maxell, Ltd., Hitachi, Ltd.
    Inventors: Toshinori Sugiyama, Masashi Suenaga, Hitoshi Watanabe, Shinitsu Kinoshita, Hirofumi Sukeda, Hisataka Sugiyama
  • Metal mold for resin substrate for an optical recording medium
    Patent number: 5180595
    Abstract: A metal mold for manufacturing a resin substrate useful as a optical recording medium.
    Type: Grant
    Filed: June 2, 1992
    Date of Patent: January 19, 1993
    Assignee: Hitachi Maxell, Ltd.
    Inventor: Shinitsu Kinoshita