Patents by Inventor Kihachiro Watanabe

Kihachiro Watanabe 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).

  • Elastic foamed sheet and wafer-polishing jig using the sheet
    Patent number: 5538465
    Abstract: An elastic foamed sheet is disclosed which is usable as waxless polishing backing pads for wafers and capable of producing mirror polish wafers excelling in flatness.
    Type: Grant
    Filed: January 6, 1995
    Date of Patent: July 23, 1996
    Assignee: Shin-Etsu Handotai Co., Ltd.
    Inventors: Shigeyoshi Netsu, Kihachiro Watanabe, Makoto Tsukada
  • Elastic foamed sheet and wafer-polishing jig using the sheet
    Patent number: 5409770
    Abstract: An elastic foamed sheet is disclosed which is usable as waxless polishing backing pads for wafers and capable of producing mirror polish wafers excelling in flatness.
    Type: Grant
    Filed: March 23, 1993
    Date of Patent: April 25, 1995
    Assignee: Shin-Etsu Handotai Co., Ltd.
    Inventors: Shigeyoshi Netsu, Kihachiro Watanabe, Makoto Tsukada