Patents by Inventor Weijiang Sun

Weijiang Sun 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).

  • Printer
    Patent number: D682348
    Type: Grant
    Filed: January 25, 2012
    Date of Patent: May 14, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiroko Suzuki, Weijiang Sun
  • Copying machine
    Patent number: D687092
    Type: Grant
    Filed: January 25, 2012
    Date of Patent: July 30, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiroko Suzuki, Weijiang Sun
  • Copying machine
    Patent number: D696341
    Type: Grant
    Filed: February 29, 2012
    Date of Patent: December 24, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Kazuyoshi Yamada, Naoto Tsuruoka, Weijiang Sun
  • Printer
    Patent number: D712960
    Type: Grant
    Filed: March 4, 2013
    Date of Patent: September 9, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Naoto Tsuruoka, Masahiro Yonekawa, Weijiang Sun, Zhiyu Liu
  • Printer
    Patent number: D714861
    Type: Grant
    Filed: March 4, 2013
    Date of Patent: October 7, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Naoto Tsuruoka, Masahiro Yonekawa, Weijiang Sun, Zhiyu Liu