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Transformers
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Patent number 7,439,843
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Issue date Oct 21, 2008
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Radian Research, Inc.
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Glenn A. Mayfield
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H01 - BASIC ELECTRIC ELEMENTS
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Transformers
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Patent number 6,903,642
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Issue date Jun 7, 2005
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Radian Research, Inc.
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Glenn A. Mayfield
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H01 - BASIC ELECTRIC ELEMENTS
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Compensated transformers
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Patent number 5,276,394
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Issue date Jan 4, 1994
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Radian Research, Inc.
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Glenn A. Mayfield
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G01 - MEASURING TESTING
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86562048 - YOU KNOW IT'S TRUE WHEN IT'S BLUE
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Serial number 86562048
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Registration number 4850032
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Filing date Mar 12, 2015
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Radian Research, Inc.
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9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments