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:
Aug. 18, 2015
Filed:
Oct. 12, 2010
Toshitaka Nakajima, Yamagata-Pref., JP;
Masami Yokoyama, Yamagata-Pref., JP;
Akira Muramoto, Kanagawa, JP;
Bruce D. Orensteen, St. Paul, MN (US);
Toshitaka Nakajima, Yamagata-Pref., JP;
Masami Yokoyama, Yamagata-Pref., JP;
Akira Muramoto, Kanagawa, JP;
Bruce D. Orensteen, St. Paul, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
The present application relates to retroreflective sheeting that is capable of use in a license plate and that can be accurately read and/or detected by an ALPR system. The retroreflective sheeting is a microsphere-based retroreflective sheeting that provides reduced retroreflectivity at high entrance angles. The retroreflective sheeting can also be a microsphere-based retroreflective sheeting that exhibits reduced retroreflectivity of incident infra-red light from high entrance angles and substantially unaffected retroreflectivity of incident visible light from entrance angles in the vicinity of the normal.