Patents by Inventor Ai Cheng Liu

Ai Cheng Liu 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).

  • Logic module
    Patent number: D602445
    Type: Grant
    Filed: March 6, 2008
    Date of Patent: October 20, 2009
    Assignee: Siemens Aktiengesellschaft
    Inventor: Ai Cheng Liu
  • Logic module
    Patent number: D603349
    Type: Grant
    Filed: March 6, 2008
    Date of Patent: November 3, 2009
    Assignee: Siemens Aktiengesellschaft
    Inventor: Ai Cheng Liu
  • Operator panel
    Patent number: D607417
    Type: Grant
    Filed: March 6, 2008
    Date of Patent: January 5, 2010
    Assignee: Siemens Aktiengesellschaft
    Inventor: Ai Cheng Liu
  • Operator panel
    Patent number: D608302
    Type: Grant
    Filed: March 6, 2008
    Date of Patent: January 19, 2010
    Assignee: Siemens Aktiengesellschaft
    Inventor: Ai Cheng Liu
  • USB PC cable
    Patent number: D609184
    Type: Grant
    Filed: March 6, 2008
    Date of Patent: February 2, 2010
    Assignee: Siemens Aktiengesellschaft
    Inventor: Ai Cheng Liu