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:
Dec. 23, 2014
Filed:
Jun. 29, 2011
Hidekazu Hoshino, Yokohama, JP;
Itsuo Takeuchi, Yokohama, JP;
Tokio Sakauchi, Yokohama, JP;
Tohru Ida, Yokohama, JP;
Hidekazu Hoshino, Yokohama, JP;
Itsuo Takeuchi, Yokohama, JP;
Tokio Sakauchi, Yokohama, JP;
Tohru Ida, Yokohama, JP;
NHK Spring Co., Ltd., Yokohama, JP;
Abstract
A technique detects counterfeit products having appearances similar to authentic products with high accuracy. A cholesteric liquid crystal layer in which hologram is processed and circularly polarized light of primary rotating direction having specific central wavelength can be selectively reflected and a code forming layer in which code printed pattern that is an objective of reading is formed, are arranged in this order seen from a side from which reading is performed. The hologram image that inhibits reading of information of the code while an optical reading device reads it together with the code, and it is formed by the hologram processing.