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:
Sep. 24, 2002
Filed:
Aug. 22, 2000
Makoto Miyamoto, Ome, JP;
Nobuhiro Tokushuku, Katsura, JP;
Hiroyuki Minemura, Kokubunji, JP;
Tetsuya Ikeda, Hitachinaka, JP;
Kenji Tokumitsu, Odawara, JP;
Kazuo Shigematsu, Yoshikawa, JP;
Harukazu Miyamoto, Kodaira, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Before original information is recorded in areas such as a recording medium management area where the same pattern of information is recorded many times, a dummy pattern that minimizes a recording film flow is recorded. Because the direction of the recording film flow depends on the length of a mark length, the dummy pattern is a pattern including marks with a unique length. Randomly or sequentially selecting and recording a plurality of dummy patterns, each with a recording film flow direction different from others, prevents jitters, which will be caused by the recording film flow, from increasing.