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Water pit transmitter assembly
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Patent number 6,954,144
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Issue date Oct 11, 2005
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AMCO Automated Systems, Inc.
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Eric Kiser
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Bi-directional protocol
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Patent number 6,512,463
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Issue date Jan 28, 2003
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American Meter Co.
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David E. Campbell
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Uni-directional protocol
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Patent number 6,304,191
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Issue date Oct 16, 2001
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American Meter Co.
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David E. Campbell
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G08 - SIGNALLING