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Auto-calibrating surround system
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Patent number 7,158,643
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Issue date Jan 2, 2007
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Keyhold Engineering, Inc.
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Bruce S. Lavoie
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Reconfigurable geolocation system
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Patent number 7,079,025
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Issue date Jul 18, 2006
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Worcester Polytechnic Institute
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William R. Michalson
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Hand-held GPS-mapping device
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Patent number 5,987,380
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Issue date Nov 16, 1999
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American Navigations Systems, Inc.
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Douglas J. Backman
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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Hand-held GPS-mapping device
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Patent number 5,902,347
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Issue date May 11, 1999
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American Navigation Systems, Inc.
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Douglas J. Backman
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS