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. 16, 2004
Filed:
Mar. 05, 2002
Hiroshi Chihara, Shizuoka, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
Information including a NewCartridgeBit indicating that a cartridge having an internal non-volatile memory is a new (unused) cartridge and information including a FirstInstallDate related to the NewCartridgeBit and the date of indicating first use of the cartridge have been recorded in the non-volatile memory of the cartridge. If an update command for updating the NewCartridgeBit has been issued, the NewCartridgeBit is updated and then the FirstInstallDate is updated if the FirstInstallDate is an initial value. If an update command for updating the FirstInstallDate has been issued, then, when the NewCartridgeBit is not an initial value, the FirstInstallDate is updated if it is the initial value. As a result, the conformity between the interrelated information the NewCartridgeBit and the FirstInstallDate can be maintained.