Tamper-resistant article and method of authenticating the same

United States of America Patent

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Mar 16, 1993
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N/A
app pub date
Feb 28, 1992
filing date
Feb 28, 1992

priority date (Note)
Expired

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Abstract

A printed document, such as a lottery ticket, includes a thermochromic layer at least over the imprinted data region. The printed document can be authenticated by applying heat to the thermochromic material and observing the presence or absence of a reversible color change.

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Patent Owner(s)

Patent Owner	Address
BABN TECHNOLOGIES INC A CORPORATION OF CANADA	5750 FULLUM STREET MONTREAL QUEBEC H2G 2H8

International Classification(s)

B42D:BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER O....

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Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Borowski, Jr Joseph C	Hatfield, PA	2	147
Fulton, Robert O	Ontario, CA	2	147
Lavoie, Jacques	Lansdale, PA	2	147

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Tamper-resistant article and method of authenticating the same

Number of patents in Portfolio can not be more than 2000

United States of America Patent

07843550

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PATENT NO	5193854
SERIAL NO	07843550
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07843550

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