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John R. Spence
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Newmarket, CA
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Patents Grants
last 30 patents
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Patent Grant
Financial transaction terminal with limited access
Patent number
6,097,606
Issue date
Aug 1, 2000
International Verifact Inc.
David Henry Groves
G06 - COMPUTING CALCULATING COUNTING
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Patent Grant
Game card and system of authorizing game card
Patent number
5,613,680
Issue date
Mar 25, 1997
International Verifact Inc.
David H. Groves
G07 - CHECKING-DEVICES
Patents Applications
last 30 patents
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Patent Application
Security arrangement for exchange of encrypted information
Publication number
20020053022
Publication date
May 2, 2002
IVI CHECKMATE CORP.
David Henry Groves
G06 - COMPUTING CALCULATING COUNTING