Patents by Inventor Syosaku Koseki

Syosaku Koseki 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).

  • Patent number: 3998987
    Abstract: An electrostatic recording element comprising a conductive layer and a surface layer electrostatically chargeable upon application of an electric field, said surface consisting of an upper recording layer and a lower insulating layer, and said recording layer containing highly insulating hydrophobic resin and an elevated amount of inorganic or organic pigment whereas said insulating layer either consisting solely of highly insulating hydrophobic resin or containing only a small amount of said pigment together with said resin which is scribable or stampable with water-soluble ink without deteriorating the recording characteristics and is at the same time capable or preventing fingerprints, and which can further be utilized as a lithographic printing plate.
    Type: Grant
    Filed: January 23, 1975
    Date of Patent: December 21, 1976
    Assignee: Tomoegawa Paper Mfg. Co., Ltd.
    Inventors: Kiichi Kirigaya, Makoto Ogiwara, Syosaku Koseki, Toshiho Yamaguchi