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:
Jun. 17, 1997
Filed:
Jul. 28, 1995
Applicant:
Inventors:
Hiroshi Watanabe, Utsunomiya, JP;
Masaru Nyui, Utsunomiya, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; G01D / ;
U.S. Cl.
CPC ...
369 50 ; 25023116 ;
Abstract
The present invention relates to a rotation information detecting method of detecting rotation information of a rotating object, comprising the step of mounting a rotating scale on a rotating shaft of the rotating object, said rotating scale having a first pattern for detecting rotation information formed thereon in advance, the detection step of detecting the rotation information of the rotating object by detecting the first pattern and the formation step of forming a second pattern for detecting rotation information on the rotating scale on the basis of the detected rotation information.