Patents by Inventor Keizo Kazama

Keizo Kazama 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).

  • Control system for cable crane
    Patent number: 5392935
    Abstract: A cable crane system includes a main cable stretched between two points, a transverse trolley traveling along the main cable, a traction cable for driving the trolley, a bucket hung by a hanging cable, a transverse winch for driving the traction cable for driving the trolley between a transportation start position to a transportation end position, a vertical winch for retracting and extracting the hanging cable for lifting the bucket up and down, and driving means for the transverse and vertical winches.
    Type: Grant
    Filed: August 13, 1993
    Date of Patent: February 28, 1995
    Assignee: Obayashi Corporation
    Inventors: Keizo Kazama, Kiichiro Tanaka, Eiji Takahashi, Michio Nakao
  • Alloy target for manufacturing a magneto-optical recording medium
    Patent number: 4915737
    Abstract: An alloy target for making a magneto-optical recording medium by sputtering comprises an alloy containing 10 to 50 atom % of at least one rare earth element selected from among Sm, Nd, Gd, Tb, Dy, Ho, Tm and Er, with a balance consisting substantially of at least one transition metal selected from among Co, Fe and Ni. The alloy has a mixed structure composed of at least three phases of intermetallic compounds formed by the rare earth element and the transition metal.
    Type: Grant
    Filed: April 29, 1988
    Date of Patent: April 10, 1990
    Assignee: Sumitomo Metal Mining Company Limited
    Inventors: Toshio Morimoto, Keizo Kazama, Yasuhiro Okajima, Yasuhiro Tsugita, Shinobu Endo
  • Banded-type implosion protection cathode ray tubes
    Patent number: 4295574
    Abstract: In a cathode ray tube reinforced by an annular reinforcing band mounted on the face plate of the tube by shrink fit, the opposite ends of the band are coupled together by interfitting members which accurately determine the peripheral length of the reinforcing band.
    Type: Grant
    Filed: May 13, 1980
    Date of Patent: October 20, 1981
    Assignee: Hitachi, Ltd.
    Inventors: Kooichi Nakazima, Keizo Kazama, Hiroshi Oki