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:
Jan. 07, 2003
Filed:
Jun. 13, 2001
Mikio Sato, Tochigi, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A stage apparatus includes a stage, a member fixed to the stage and a weight compensation mechanism having at least three spring members for compensating for a weight of a structure including the stage and the member. A barycentric position of the structure deviates from a centroid of a polygon formed by support points of the at least three spring members. The spring constants of the at least three spring members are based on a relative positional relationship between the barycentric position of the structure and the at least three spring members so as to set at least one spring constant different from the other spring constants.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile