Patents by Inventor Sadao Kinugasa

Sadao Kinugasa 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).

  • Magnetic recording medium having a fibrous substrate, a styrene-butadiene underlayer, and a magnetic layer on a first side and an image recording layer on the second side
    Patent number: 5447790
    Abstract: There is discloses a magnetic recording sheet comprising a substrate, a magnetic recording layer formed on one side of the substrate, an image recording layer formed on the other side of the substrate, a first subbing layer formed between the substrate at the magnetic recording layer, and preferably, a second subbing layer formed between the substrate and the image recording layer, said magnetic recording layer comprising a magnetic powder and an aqueous binder, said image recording layer comprising a binder, and said first and second subbing layers comprising a styrene-butadiene latex having a gel content of 5 to 75%. This magnetic recording sheet can be obtained without any trouble in its production process and is excellent in dimensional stability, magnetic recording properties, image-recording properties, etc.
    Type: Grant
    Filed: December 17, 1993
    Date of Patent: September 5, 1995
    Assignee: Mitsubishi Paper Mills Limited
    Inventors: Haruyoshi Funae, Sadao Kinugasa, Hideo Makishima, Hideaki Senoh