Invention Grant
- Patent Title: Anti-counterfeiting medium
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Application No.: US16196180Application Date: 2018-11-20
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Publication No.: US10647147B2Publication Date: 2020-05-12
- Inventor: Kozue Umeda , Mihoko Okawa
- Applicant: TOPPAN PRINTING CO., LTD.
- Applicant Address: JP Tokyo
- Assignee: TOPPAN PRINTING CO., LTD.
- Current Assignee: TOPPAN PRINTING CO., LTD.
- Current Assignee Address: JP Tokyo
- Agency: Foley & Lardner LLP
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@1bf35e1f
- Main IPC: B42D25/328
- IPC: B42D25/328 ; B42D25/364 ; G09F3/02 ; B42D5/04 ; G09F3/00 ; B42D25/324 ; B42D25/373 ; G02B5/18 ; G02B5/30

Abstract:
A anti-counterfeiting medium includes a support substrate, an OVD forming layer, and a latent image layer in this order. The latent image layer has plural regions with optical axes of a birefringent material aligned in directions different from each other. The OVD forming layer includes an uneven-structure-forming layer is made up of a first region and a second region, and a reflecting layer. The first region is a region made up of a flat part and plural convexities or concavities. The second region is configured by a flat part. Each of the plural convexities and concavities has a 0.3 to 5 μm long side dimension and short side dimension and height or depth of 0.1 to 0.5 μm or less.
Public/Granted literature
- US20190084337A1 ANTI-COUNTERFEITING MEDIUM Public/Granted day:2019-03-21
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