Patents by Inventor Tetsuroh Hashiguchi

Tetsuroh Hashiguchi 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).

  • Steel for machine structural use and machine parts made from such steel
    Patent number: 5993571
    Abstract: A steel for machine structural use, essentially having the following chemical composition:C: 0.45-0.60 wt %,Si: 0.50-2.00 wt %,Mn: 0.10-0.30 (0.30 not inclusive) wt %,P: 0.01-0.10 wt %,S: 0.01-0.20 wt %,V: 0.08-0.15 wt %, andN: 0.0020-0.0050 (0.0050 not inclusive) wt %. The remainder is Fe and impurities inevitably included. The inner structure of the steel is a ferrite-pearlite structure.
    Type: Grant
    Filed: November 18, 1998
    Date of Patent: November 30, 1999
    Assignee: Isuzu Motors Limited and Nippon Steel Corporation
    Inventors: Hirohito Eto, Hiromasa Takada, Tetsuroh Hashiguchi, Osamu Ohyama