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Digital engine analyzer
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Patent number 5,296,869
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Issue date Mar 22, 1994
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Snap-on Tools Corporation
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Gary D. Jonker
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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Digital engine analyzer
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Patent number 5,258,753
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Issue date Nov 2, 1993
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Snap-on Tools Corporation
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Gary D. Jonker
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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Digital engine analyzer
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Patent number 5,247,287
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Issue date Sep 21, 1993
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Snap-on Tools Corporation
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Gary D. Jonker
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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Digital engine analyzer
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Patent number 5,245,324
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Issue date Sep 14, 1993
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Snap-on Tools Corporation
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Gary D. Jonker
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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Digital oscilloscope
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Patent number D335093
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Issue date Apr 27, 1993
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Snap-on Tools Corporation
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Robert J. Holmen
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D10 - Measuring, testing, or signalling instruments
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Digital engine analyzer
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Patent number 4,980,845
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Issue date Dec 25, 1990
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Snap-on Tools Corporation
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Michael C. Putrow
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS