Patents by Inventor Anny Liu

Anny 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).

  • Calculator capable of recovering cleared values
    Patent number: 6865586
    Abstract: A calculator comprises an input having an UNDO key for recovering cleared values. When displayed data or recorded data of memory is cleared by pressing one of deletion keys, the cleared data is pushed into a stack register. A flag register is set when the displayed data or recorded data is cleared by a deletion key. When the UNDO key is pressed and the flag register indicates that the displayed data or recorded data was cleared by the deletion key, a data entry is popped from the stack register, so as to recover the cleared value.
    Type: Grant
    Filed: February 7, 2002
    Date of Patent: March 8, 2005
    Assignee: Kinpo Electronics, Inc.
    Inventors: Frank Chen, Anny Liu
  • Calculator capable of recovering cleared values
    Publication number: 20030149710
    Abstract: A calculator comprises an input having an UNDO key for recovering cleared values. When displayed data or recorded data of memory is cleared by pressing one of deletion keys, the cleared data is pushed into a stack register. A flag register is set when the displayed data or recorded data is cleared by a deletion key. When the UNDO key is pressed and the flag register indicates that the displayed data or recorded data was cleared by the deletion key, a data entry is popped from the stack register, so as to recover the cleared value.
    Type: Application
    Filed: February 7, 2002
    Publication date: August 7, 2003
    Applicant: Kinpo Electronics, Inc.
    Inventors: Frank Chen, Anny Liu