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. 28, 2020
Filed:
Apr. 20, 2018
Seiko Epson Corporation, Tokyo, JP;
Hiroshi Wada, Azumino, JP;
Seiko Epson Corporation, , JP;
Abstract
An encoder includes an optical scale including a scale portion that is constituted with a polarizer, a light emitting portion which emits light, an optical element unit which divides the light into first light and second light and makes the first and second lights incident onto the scale portion, and a light receiving portion which receives the first light and the second light from the scale unit and outputs a signal corresponding to intensities of the received first light and second light, and in which the first light and the second light overlap other within a plane of the scale portion.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile