Patents by Inventor Tatsuo Ohya

Tatsuo Ohya 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).

  • Titaniums having excellent impact resistance and manufacturing methods
    Patent number: 6719856
    Abstract: Titaniums having excellent impact resistance are manufactured by methods that attain good cold workability by controlling the concentrations of oxygen, nitrogen, carbon and iron contained in ordinary pure titaniums in the desired range, applying combinations of preliminary working and annealing before or during the forming process, and controlling the Vickers hardness in the cross-sectional area to the desired range according to the concentrations, without adding aluminum, molybdenum, vanadium or other alloying elements.
    Type: Grant
    Filed: July 31, 2001
    Date of Patent: April 13, 2004
    Assignees: Nippon Steel Corporation, MIC Japan, Ltd.
    Inventors: Kazuhiro Takahashi, Motomi Masaki, Kazuyuki Miura, Tatsuo Ohya
  • Titaniums having excellent impact resistance and manufacturing methods
    Publication number: 20030062102
    Abstract: Titaniums having excellent impact resistance are manufactured by methods that attain good cold workability by controlling the concentrations of oxygen, nitrogen, carbon and iron contained in ordinary pure titaniums in the desired range, applying combinations of preliminary working and annealing before or during the forming process, and controlling the Vickers hardness in the cross-sectional area to the desired range according to the concentrations, without adding aluminum, molybdenum, vanadium or other alloying elements.
    Type: Application
    Filed: July 31, 2001
    Publication date: April 3, 2003
    Inventors: Kazuhiro Takahashi, Motomi Masaki, Kazuyuki Miura, Tatsuo Ohya