Patents by Inventor Toshio Tsukada

Toshio Tsukada 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).

  • Silver halide photographic emulsion and photothermographic material using the same
    Patent number: 7153642
    Abstract: A high silver iodide photographic emulsion is provides, which has a high sensitivity and a narrow size distribution, and is a photosensitive silver halide photographic emulsion having a silver iodide content of 90 mol % or more, wherein the average grain size (R) and the average crystallite size (r) of silver halide emulsion grains in the emulsion satisfy the relationship of 1?R/r<2.
    Type: Grant
    Filed: October 10, 2003
    Date of Patent: December 26, 2006
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Satoshi Aiba, Tadaaki Tani, Toshio Tsukada
  • Silver halide photographic emulsion and photothermographic material using the same
    Publication number: 20040076913
    Abstract: A high silver iodide photographic emulsion is provides, which has a high sensitivity and a narrow size distribution, and is a photosensitive silver halide photographic emulsion having a silver iodide content of 90 mol % or more, wherein the average grain size (R) and the average crystallite size (r) of silver halide emulsion grains in the emulsion satisfy the relationship of 1≦R/r<2.
    Type: Application
    Filed: October 10, 2003
    Publication date: April 22, 2004
    Inventors: Satoshi Aiba, Tadaaki Tani, Toshio Tsukada
  • Grain-oriented electrical steel sheet having stable magnetic properties resistant to stress-relief annealing, and method and apparatus for producing the same
    Patent number: 4750949
    Abstract: A grain-oriented electrical steel sheet having a low watt loss after stress relief annealing is proposed. The steel sheet, which is final texture annealed, and to which tension is imparted, has a number of recessed parts on the surface thereof forming indentations into the steel sheet body having a depth in the range of from 0.01 to 0.1 mm. The recessed parts are filled with a composition having a coefficient of thermal expansion smaller than that of the steel sheet body. From the recessed parts and the composition the magnetic domains are subdivided.
    Type: Grant
    Filed: November 12, 1985
    Date of Patent: June 14, 1988
    Assignee: Nippon Steel Corporation
    Inventors: Hisashi Kobayashi, Motoharu Nakamura, Kikuji Hirose, Toshio Tsukada, Hirofumi Yamashita