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:
Oct. 22, 2002
Filed:
Aug. 28, 2000
Applicant:
Inventors:
Masato Tanaka, Tokyo, JP;
Shigeru Ishimoto, Kanagawa, JP;
Toyohiko Matsuda, Kanagawa, JP;
Katsumi Kitamura, Kanagawa, JP;
Assignee:
Sony Precision Technology Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01C 9/00 ; G06F 1/500 ;
U.S. Cl.
CPC ...
G01C 9/00 ; G06F 1/500 ;
Abstract
A position detector detects the position of a detector section relative to a record medium having recorded thereon a periodic position signal. The detector section has two detectors that produce first and second detection signals that are polar converted and processed, based on the number of divisions in a quadrant of the periodic position signal.