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Tire monitoring system
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Patent number 6,259,361
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Issue date Jul 10, 2001
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Prince Corporation
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James P. Robillard
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B60 - VEHICLES IN GENERAL
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Dual-calibrated compass
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Patent number 6,192,315
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Issue date Feb 20, 2001
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Prince Corporation
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James R. Geschke
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G01 - MEASURING TESTING
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Last exit warning system
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Patent number 5,790,973
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Issue date Aug 4, 1998
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Prince Corporation
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David A. Blaker
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B60 - VEHICLES IN GENERAL
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Vehicle compass system
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Patent number 5,761,094
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Issue date Jun 2, 1998
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Prince Corporation
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Thomas R. Olson
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G01 - MEASURING TESTING
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