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:
Nov. 19, 1996
Filed:
Jun. 19, 1995
Keiji Sawanobori, Itabashi-ku, JP;
Asahi Kogaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
An optical reader for optically reading an information pattern representing coded data includes a reading head having a hollow casing with a first opening formed in a wall portion thereof to define a reading area, and a light source to illuminate the reading area. The hollow casing has a second opening formed in another wall portion thereof. The second opening is closed by an optical filter which exhibits a large transmissivity to a part of the light emitted from the light source and included in a predetermined wavelength band. Thus, the reading area is visible through the optical filter and a user can visually confirm whether or not the information pattern to be read is encompassed by the reading area.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile