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:
Aug. 14, 2007
Filed:
Jan. 26, 2004
Yoshiyuki Shimamura, Kanagawa, JP;
Yoshiyuki Shimamura, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
In a printing apparatus which must periodically execute maintenance operation after activation and has a timer that counts the time on the basis of power supplied from a battery and has a register in which a flag is written when an abnormality occurs in the battery, the internal time is so set as to be counted up on the basis of time read out from the timer. When the flag is written in the register upon activating the apparatus, information representing occurrence of the abnormality is written in a nonvolatile storage. Predetermined time is set as the internal time, the flag is cleared, and execution of maintenance operation is designated on the basis of the internal time.