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Cart management system
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Patent number 6,142,283
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Issue date Nov 7, 2000
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Smarte Carte, Inc.
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Keith L. Amdahl
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G06 - COMPUTING CALCULATING COUNTING
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Cart management system
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Patent number 6,125,985
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Issue date Oct 3, 2000
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Smarte Carte, Inc.
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Keith L. Amdahl
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G06 - COMPUTING CALCULATING COUNTING
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Cart management system and method
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Patent number 6,024,203
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Issue date Feb 15, 2000
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Smarte Carte, Inc.
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Keith L. Amdahl
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A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
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Cart management system
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Patent number 5,921,373
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Issue date Jul 13, 1999
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Smart Carte, Inc.
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Keith L. Amdahl
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G06 - COMPUTING CALCULATING COUNTING
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Cart management system
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Patent number 5,526,916
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Issue date Jun 18, 1996
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Smarte Carte, Inc.
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Keith L. Amdahl
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A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
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Coin operated shopping cart rental system
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Patent number 5,069,325
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Issue date Dec 3, 1991
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Schonberg; David J.
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David J. Schonberg
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A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
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3897863
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Patent number 3,897,863
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Issue date Aug 5, 1975
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G07 - CHECKING-DEVICES
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3882982
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Patent number 3,882,982
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Issue date May 13, 1975
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G07 - CHECKING-DEVICES
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3837455
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Patent number 3,837,455
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Issue date Sep 24, 1974
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G07 - CHECKING-DEVICES
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3754630
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Patent number 3,754,630
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Issue date Aug 28, 1973
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G07 - CHECKING-DEVICES
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3283868
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Patent number 3,283,868
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Issue date Nov 8, 1966
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G07 - CHECKING-DEVICES
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3165189
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Patent number 3,165,189
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Issue date Jan 12, 1965
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G07 - CHECKING-DEVICES
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2753970
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Patent number 2,753,970
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Issue date Jul 10, 1956
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G07 - CHECKING-DEVICES