Patents by Inventor Toshihiko Kohno

Toshihiko Kohno 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).

  • Electron beam lithography system
    Patent number: 5326979
    Abstract: An electron beam lithography system which generates phase shift pattern data relating to main patterns, and exposes the phase shift pattern on a mask plate by using an electron beam in accordance with instruction from a computer. An electron beam lithography system is provided which can remarkably decrease a time needed for preparing phase shift pattern data. The apparatus is furnished with a parameter table for storing equations to generate phase shift pattern data, and generates the phase shift pattern data by assigning original pattern data into equations in accordance with a corresponding instruction for applying a phase shift method, and automatically exposes the phase shift pattern.
    Type: Grant
    Filed: September 25, 1992
    Date of Patent: July 5, 1994
    Assignee: Hitachi, Ltd.
    Inventors: Katsuhiro Kawasaki, Takashi Matsuzaka, Hiroya Ohta, Toshihiko Kohno
  • Carrier for use in electrophotographic developers
    Patent number: 4663262
    Abstract: A noval carrier powder for electrophotographic developers is provided. The carrier powder comprises spherical magnetite particles having a wustite (FeO) content of less than 10% by weight, a particle diameter of 30-200 .mu.m and a surface porosity of less than 20%.
    Type: Grant
    Filed: December 26, 1985
    Date of Patent: May 5, 1987
    Assignees: Kanto Denka Kogyo Co., Ltd., Hoganas AB
    Inventors: Kazuyoshi Oka, Mitsuhiro Katayama, Toshihiko Kohno, Ulf Engstrom, Svenn-Erik Larssen
  • Phosphonic acid ester, pharmaceutical compositions containing the same and method of using the same
    Patent number: 4434162
    Abstract: A phosphonic acid ester of the formula ##STR1## exhibits calcium-antagonistic, coronary vasodilating and hypotensive activities. Pharmaceutical compositions containing the same are useful for the prophylaxis and treatment of circulatory organ diseases such as angina pectoris, hypertension and the like.
    Type: Grant
    Filed: April 7, 1982
    Date of Patent: February 28, 1984
    Assignee: Kanebo, Ltd.
    Inventors: Goro Tsukamoto, Toshihiko Kohno, Koichiro Yoshino, Tominori Morita, Keizo Ito, Takashi Nose
  • 2-Substituted benzimidazole compounds
    Patent number: 4192880
    Abstract: 2-Substituted benzimidazole compounds of the formula: ##STR1## wherein R.sub.1 is hydrogen, halogen, lower alkyl or lower alkoxy, and R.sub.2 is hydrogen or lower alkyl with the proviso that R.sub.1 and R.sub.2 do not stand for hydrogen simultaneously and, when R.sub.1 is hydrogen, R.sub.2 cannot mean a methyl group at 6th position on the pyridin-2-yl group or methyl an isobutyl group on the phenyl group; are useful as anti-inflammatory agents and/or analgesics.
    Type: Grant
    Filed: October 10, 1978
    Date of Patent: March 11, 1980
    Assignee: Kanebo, Ltd.
    Inventors: Goro Tsukamoto, Koichiro Yoshino, Toshihiko Kohno, Masahiro Taguchi, Katsumi Dezawa, Hajime Kagaya, Keizo Ito, Takashi Nose
  • 2-Substituted benzimidazole compounds
    Patent number: 4188486
    Abstract: 2-Substituted benzimidazole compounds of the formula: ##STR1## wherein R.sub.1 is hydrogen, halogen, lower alkyl or lower alkoxy, and R.sub.2 is hydrogen or lower alkyl with the proviso that R.sub.1 and R.sub.2 do not stand for hydrogen simultaneously and, when R.sub.1 is hydrogen, R.sub.2 cannot mean a methyl group at the 6th position on the pyridin-2-yl group or methyl an isobutyl group on the phenyl group; are useful as anti-inflammatory agents and/or analgesics.
    Type: Grant
    Filed: December 2, 1977
    Date of Patent: February 12, 1980
    Assignee: Kanebo, Ltd.
    Inventors: Goro Tsukamoto, Koichiro Yoshino, Toshihiko Kohno, Masahiro Taguchi, Katsumi Dezawa, Hajime Kagaya, Keiso Ito, Takashi Nose