Patents by Inventor Ikuo Yamagiwa

Ikuo Yamagiwa 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).

  • Composite gasket material
    Patent number: 5128209
    Abstract: Composite gasket materials comprising one or more layers of porous fluoropolymer film laminated to one or more layers of expanded-graphite sheet, or a subassembly of one or more layers of expanded-graphite sheet laminated to metal sheet. The composite gasket materials are suitable for use in many applications where asbestos-containing materials are used.
    Type: Grant
    Filed: June 20, 1991
    Date of Patent: July 7, 1992
    Assignee: Japan Gore-Tex, Inc.
    Inventors: Yakichi Sakai, Ikuo Yamagiwa, Masayuki Aso