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Digital transducers
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Patent number 3,947,692
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Issue date Mar 30, 1976
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Viron E. Payne, Inc.
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Viron E. Payne
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G01 - MEASURING TESTING
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3893111
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Patent number 3,893,111
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Issue date Jul 1, 1975
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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3888121
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Patent number 3,888,121
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Issue date Jun 10, 1975
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G01 - MEASURING TESTING