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:
Sep. 30, 2003
Filed:
Apr. 27, 2000
Akihito Shiozawa, Yokohama, JP;
Shinichiro Suzuki, Yokohama, JP;
Suzushi Nishimura, Yokohama, JP;
Hidekazu Hoshino, Yokohama, JP;
Itsuo Takeuchi, Yokohama, JP;
Mikihiko Sakakibara, Tokyo-To, JP;
Masumi Yokoyama, Tokyo-To, JP;
Other;
Abstract
An authenticity identifying film ( ) has a reflective film ( ) having a circularly polarized light selectivity to reflect at least only either of right-handed circularly polarized light and left-handed circularly polarized light of incident light to produce reflected light. The reflective film ( ) is provided with a hologram forming part ( ). The hologram forming part ( ) reflects circularly polarized light of the same circular polarization as that of the reflected light in a direction different from that of the reflected light to form a holographic image. The reflected light reflected by the reflective film ( ) and the holographic image formed by the hologram forming part ( ) are detected by detectors disposed at different positions, respectively.