Patents by Inventor Keiji Kai

Keiji Kai 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).

  • Printing method
    Patent number: 6238828
    Abstract: A printing method directed to a plurality of pieces of slip paper which have been bound into a book and to the outer surface, of which ink containing an initiator and either one of coloring matter and a precursor of coloring matter is applied are placed. A printing plate has a through portion through which radiation penetrates and whose shape corresponds to a pattern to be printed. The printing plate is placed ont he stacked slip paper and X-rays are irradiated upon the printing plate fro the above direction so as to print the pattern of a character on each pieces of the slip paper at a desired are thereof.
    Type: Grant
    Filed: September 8, 2000
    Date of Patent: May 29, 2001
    Assignee: Kokuyo Co., Ltd.
    Inventors: Keiji Kai, Takaaki Kiyose
  • Printing method
    Patent number: 6159650
    Abstract: A printing method directed to a plurality of pieces of slip paper which have been bound into a book and to the outer surface, of which ink containing an initiator and either one of coloring matter and a precursor of coloring matter is applied are placed. A printing plate has a through portion through which radiation penetrates and whose shape corresponds to a pattern to be printed. The printing plate is placed ont he stacked slip paper and X-rays are irradiated upon the printing plate fro the above direction so as to print the pattern of a character on each pieces of the slip paper at a desired are thereof.
    Type: Grant
    Filed: May 26, 1998
    Date of Patent: December 12, 2000
    Assignee: Kokuyo Co., Ltd.
    Inventors: Keiji Kai, Takaaki Kiyose
  • .alpha.-crystals of cefazolin sodium
    Patent number: 4898937
    Abstract: This invention relates to .alpha.-crystals of cefazolin sodium with a water content in the range of 13.0 to 15.8%, useful as an antibiotic of improved thermal and light stability.
    Type: Grant
    Filed: February 2, 1989
    Date of Patent: February 6, 1990
    Assignee: Fujisawa Pharmaceutical Co., Ltd.
    Inventors: Toshinobu Uemura, Keiji Kai, Masateru Kodani, Fumiyo Yoshida, Matsuhiko Aratani