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:
Feb. 05, 1991
Filed:
Jul. 06, 1987
Hiroshi Sato, Yokohama, JP;
Michitaka Setani, Kawasaki, JP;
Kazuyuki Kondo, Kawasaki, JP;
Takeshi Kuwayama, Yokohama, JP;
Tokihide Ebata, Tanashi, JP;
Haruo Tsunoi, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image reading device capable of reading a projected image has a lens array for forming an image from the projected light. Upbeam of the lens array is disposed a diffusion member which diffuses the luminous flux of the projected light. Preferably, a Fresnel lens is disposed to receive the projected light, and the diffusion member is a lower surface of the Fresnel lens which has been subjected to a surface-roughening treatment.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile