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:
Dec. 14, 1993
Filed:
Jun. 27, 1991
Katsuhiko Kaida, Tokyo, JP;
Hideo Masaki, Tokyo, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
In a magnetic recording and reproducing apparatus, in order to prevent the address code data for identifying the cylinder number of a recording medium from producing continuous erase data, address code data with a gray code arrangement is modulated by a predetermined modulation method, and the modulated address code data is recorded on the recording medium. In this case, address clocks are recorded on the recording medium at predetermined intervals by the magnetization change in a predetermined direction. After the address clocks are recorded, the address data are recorded by the magnetization change in a direction opposite to the predetermined direction.