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Holographic security device
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Patent number 5,694,229
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Issue date Dec 2, 1997
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De La Rue Holographics Limited
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Kenneth John Drinkwater
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B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
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Image enhancement
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Patent number 5,665,194
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Issue date Sep 9, 1997
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De La Rue Holographics Limited
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Ralph Kay
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B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
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Decorative article
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Patent number 5,492,370
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Issue date Feb 20, 1996
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De La Rue Holographics Ltd.
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Charles E. Chatwin
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B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
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Security device
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Patent number 5,483,363
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Issue date Jan 9, 1996
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De La Rue Holographics Limited
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Brian W. Holmes
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B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
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Optical device
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Patent number 5,310,222
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Issue date May 10, 1994
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De La Rue Holographics Limited
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Charles E. Chatwin
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G06 - COMPUTING CALCULATING COUNTING