Patents by Inventor Masaji Nara

Masaji Nara 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).

  • Protective film of polarizing plate
    Patent number: 6008940
    Abstract: A protective film for use with a polarizing plate has a support carrying a glare-proof layer. The glare-proof layer is a resin with coarse particles having an average particle size of 0.25 to 10 .mu.m, and fine particles having an average particle size of 0.1 .mu.m or less and a refractive index of 1.40 to 1.60, embedded in it.
    Type: Grant
    Filed: February 28, 1997
    Date of Patent: December 28, 1999
    Assignee: Konica Corporation
    Inventors: Isamu Michihata, Koichi Nagayasu, Toru Kobayashi, Masaji Nara
  • Protective film for polarizing plate
    Patent number: 5914073
    Abstract: A protective film for a polarizing plate comprises a resin film, and provided thereon, a layer comprising a polyol acrylate resin.
    Type: Grant
    Filed: July 26, 1996
    Date of Patent: June 22, 1999
    Assignee: Konica Corporation
    Inventors: Toru Kobayashi, Naoko Morita, Koichi Nagayasu, Isamu Michihata, Masaji Nara
  • Magnetic recording medium
    Patent number: 4684572
    Abstract: A magnetic recording medium having a magnetic layer and a backing layer on opposite sides of a support is disclosed. The backing layer comprises a binder resin, a conductive carbon black and an organic powder.
    Type: Grant
    Filed: April 23, 1985
    Date of Patent: August 4, 1987
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Yoshitaka Yasufuku, Masaji Nara, Shigeru Akutsu
  • Magnetic recording medium
    Patent number: 4652496
    Abstract: Disclosed is a magnetic recording medium which comprises a support, a magnetic recording layer and optionally a back-coating layer, at least of said magnetic recording layer and said back-coating layer containing a urethane resin having a yield point.The tape performances of the magnetic recording medium according to the present invention can be markedly improved by incorporating the urethane resin having a yield point.
    Type: Grant
    Filed: June 7, 1985
    Date of Patent: March 24, 1987
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Yoshitaka Yasufuku, Masaji Nara, Shigeru Akutsu