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:
Jun. 15, 2004
Filed:
Dec. 19, 1997
Ryoji Kubo, Chiba-ken, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A recording system comprises a non-volatile recording medium, a recording device for recording information data on the recording medium, the recording medium including a first recording area in which to record the information data, a second recording area in which to record data indicative of an erased area in the first recording area, and a third recording area in which to record data indicative of a use status of each area in the first recording area. The recording device is operative to detect from the recording medium the data recorded in the second area and the data recorded in the third recording area, and perform erasure of, and recording of the information data in, a recording-enable and unerased area in the first recording area. A data processing apparatus comprises a detector for detecting whether a non-volatile recording medium has been attached and an erasing device for erasing information data from a predetermined area of the recording medium, less than the entire recording area, according to an output of said detecting means.