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Liquid dosing device with digital display
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Patent number 4,815,632
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Issue date Mar 28, 1989
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Jencons (Scientific) Limited
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Graham J. Ball
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B67 - OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS LIQUID...
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Liquid dosing device with digital display
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Patent number 4,760,939
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Issue date Aug 2, 1988
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Jencons (Scientific) Limited
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Graham J. Ball
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B67 - OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS LIQUID...