Document card containing information in holographic form

PR Chevillat, F Gfeller - US Patent 4,400,616, 1983 - Google Patents
An identification card provided with secret data contained in the form of a wave guide
hologram recorded in a layer on the card. Light for developing or displaying the hologram is …
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Document card containing information in holographic form

PR Chevillat, F Gfeller - US Patent 4,400,616, 1983 - freepatentsonline.com
An identification card provided with secret data contained in the form of a wave guide
hologram recorded in a layer on the card. Light for developing or displaying the hologram is …