Patents by Inventor Kazuho Fujiwara

Kazuho Fujiwara 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).

  • Pressure- and heat-sensitive multilayer copying paper
    Patent number: 5567668
    Abstract: This invention provides a pressure- and heat-sensitive multilayer copying paper useful as a recording material for various types of recording machines, such as a portable terminal. A pressure- and heat-sensitive multilayer copying paper comprises: an upper paper member composed of: a substrate sheet; a layer provided on a front surface of the substrate sheet comprising a organic compound and an acidic organic compound; a layer provided on a back surface of the substrate sheet comprising a organic compound, microcapsules encapsulating the organic compound and a thermomeltable material; and an overcoated protective layer placed on the layer provided on a back surface of the substrate sheet; and a lower paper member: a substrate sheet; a layer provided on a front surface of the substrate sheet comprising at least one acidic organic compound which forms color in case that it reacts with the organic compound.
    Type: Grant
    Filed: December 21, 1994
    Date of Patent: October 22, 1996
    Assignee: Naigai Carbon Ink Co., Ltd.
    Inventors: Kunio Oda, Nobuhiko Kitada, Akihiro Tanaka, Kazuho Fujiwara, Shinichi Matsumoto