Patents by Inventor Shizue Ito

Shizue Ito 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).

  • Soft metal and method for preparation thereof, and exterior part of watch and method for preparation thereof
    Patent number: 7396595
    Abstract: A soft metal and a decorative article of wristwatch are produced by forming, on the surface of a soft metal article (2), a hard layer (3, 13) containing zirconium and molybdenum, or containing zirconium, molybdenum and further an additive element constituted of at least one or more elements selected from niobium, tantalum, and titanium. It is preferable that the content of molybdenum constituting the hard layer (3, 13) is about 30 to 75 wt %, or that the content of molybdenum is about 25 to 65 wt % and the total content of the additive elements is about 25 wt % or less.
    Type: Grant
    Filed: August 30, 2002
    Date of Patent: July 8, 2008
    Assignee: Citizen Holdings Co., Ltd.
    Inventors: Yoshitsugu Shibuya, Junji Satoh, Shizue Ito
  • Soft metal and method for preparation thereof, and exterior part of watch and method for preparation thereof
    Publication number: 20040231159
    Abstract: A soft metal and a decorative article of wristwatch are produced by forming, on the surface of a soft metal article (2), a hard layer (3, 13) containing zirconium and molybdenum, or containing zirconium, molybdenum and further an additive element constituted of at least one or more elements selected from niobium, tantalum, and titanium. It is preferable that the content of molybdenum constituting the hard layer (3, 13) is about 30 to 75 wt %, or that the content of molybdenum is about 25 to 65 wt % and the total content of the additive elements is about 25 wt % or less.
    Type: Application
    Filed: March 17, 2004
    Publication date: November 25, 2004
    Inventors: Yoshitsugu Shibuya, Junji Satoh, Shizue Ito