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:
Apr. 19, 2011
Filed:
May. 30, 2006
Applicants:
Masahiro Kato, Tokorozawa, JP;
Tsuyoshi Hasebe, Tokorozawa, JP;
Masayoshi Yoshida, Tokorozawa, JP;
Toshio Suzuki, Tokorozawa, JP;
Kazuo Kuroda, Tokorozawa, JP;
Inventors:
Masahiro Kato, Tokorozawa, JP;
Tsuyoshi Hasebe, Tokorozawa, JP;
Masayoshi Yoshida, Tokorozawa, JP;
Toshio Suzuki, Tokorozawa, JP;
Kazuo Kuroda, Tokorozawa, JP;
Assignee:
Pioneer Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 7/24 (2006.01);
U.S. Cl.
CPC ...
Abstract
In a recording disc, a straight groove () and a position determining pit () are formed in an inner circumference area (), and a straight groove () and an over-run preventing pit () are formed in an outer circumference area (), and only a straight groove () is formed over the entire middle area ().