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Automated coin grading system
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Patent number 5,224,176
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Issue date Jun 29, 1993
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Professional Coin Grading Service, Inc.
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Louis M. Crain
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G06 - COMPUTING CALCULATING COUNTING
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Automated coin grading system
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Patent number 5,220,614
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Issue date Jun 15, 1993
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Professional Coin Grading Service, Inc.
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Louis M. Crain
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G06 - COMPUTING CALCULATING COUNTING
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Tamperproof coin case
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Patent number 5,109,977
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Issue date May 5, 1992
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Professional Coin Grading Service, Inc.
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Stephen H. Mayer
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A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
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Tamperproof coin case
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Patent number 5,042,650
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Issue date Aug 27, 1991
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Professional Coin Grading Service, Inc.
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Stephen H. Mayer
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A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...