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Underwater warnings
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Patent number 10,183,731
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Issue date Jan 22, 2019
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Pelagic Pressure Systems Corp.
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Robert R. Hollis
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G01 - MEASURING TESTING
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Dive computer with free dive mode
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Patent number 8,600,701
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Issue date Dec 3, 2013
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American Underwater Products, Inc.
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Robert Hollis
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B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
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Ascent rate meter for SCUBA divers
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Patent number 5,156,055
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Issue date Oct 20, 1992
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American Underwater Products, Inc.
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Robert Hollis
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B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
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