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:
May. 08, 1990
Filed:
May. 17, 1988
Hiroyuki Takimoto, Kanagawa, JP;
Kenichi Nagasawa, Kanagawa, JP;
Mikihiro Fujimoto, Kanagawa, JP;
Hiroyuki Kobayashi, Kanagawa, JP;
Masahiro Takei, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An apparatus for reproducing recorded signals by periodically tracing with reproducing heads many recording tracks formed on a record bearing medium, is arranged to form from the output of the reproducing head a first periodic signal relative to a tracking error between the head and one of many recording tracks; and to control the movement of the record bearing medium relative to the reproducing head on the basis of a phase difference between the first periodic signal and a second periodic signal which is related to the tracing period of the reproducing head.