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Test tube drop dispenser
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Patent number 5,697,522
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Issue date Dec 16, 1997
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Helena Laboratories Corporation
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Ronald A. Mayes
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B67 - OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS LIQUID...
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Pipette pump
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Patent number 5,125,544
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Issue date Jun 30, 1992
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Helena Laboratories Corporation
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Seymon N. Millner
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Container and non-removable cover
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Patent number 4,799,597
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Issue date Jan 24, 1989
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Helena Laboratories Corporation
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Ronald A. Mayes
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Container and non-removable cover
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Patent number 4,736,859
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Issue date Apr 12, 1988
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Helena Laboratories Corporation
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Ronald A. Mayes
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Fluid proportioning device
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Patent number 4,683,911
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Issue date Aug 4, 1987
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Helena Laboratories
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Ronald A. Mayes
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE