The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 08, 2005
Filed:
Feb. 07, 2002
Applicants:
Frank Chen, Taipei Hsien, TW;
Anny Liu, Taipei Hsien, TW;
Inventors:
Frank Chen, Taipei Hsien, TW;
Anny Liu, Taipei Hsien, TW;
Assignee:
Kinpo Electronics, Inc., Taipei, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F003/00 ;
U.S. Cl.
CPC ...
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.