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Kitty door knocker
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Patent number 10,378,274
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Issue date Aug 13, 2019
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Michael David Langstroth
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A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
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Two tone whistle
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Patent number 10,311,852
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Issue date Jun 4, 2019
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Dale Roe
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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Portable panic alarm
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Patent number 10,192,409
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Issue date Jan 29, 2019
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Donald M. Schmidt
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G08 - SIGNALLING
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-
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Ambient gas flow alarm
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Patent number 9,489,935
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Issue date Nov 8, 2016
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PROMETHEUS MEDICAL INNOVATIONS LLC
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Randy J. Dawson
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Door harps
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Patent number 4,976,214
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Issue date Dec 11, 1990
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Robert A. Taylor
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G08 - SIGNALLING
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Motor bell alarm
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Patent number 4,970,490
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Issue date Nov 13, 1990
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Wheelock Inc.
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Stephen W. Andrews
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G08 - SIGNALLING
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-
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3325800
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Patent number 3,325,800
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Issue date Jun 13, 1967
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G08 - SIGNALLING
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3282241
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Patent number 3,282,241
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Issue date Nov 1, 1966
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G08 - SIGNALLING
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3277859
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Patent number 3,277,859
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Issue date Oct 11, 1966
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G08 - SIGNALLING
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3154937
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Patent number 3,154,937
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Issue date Nov 3, 1964
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G08 - SIGNALLING
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3144851
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Patent number 3,144,851
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Issue date Aug 18, 1964
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G08 - SIGNALLING
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3123040
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Patent number 3,123,040
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Issue date Mar 3, 1964
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B60 - VEHICLES IN GENERAL
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3083681
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Patent number 3,083,681
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Issue date Apr 2, 1963
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G08 - SIGNALLING
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3039424
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Patent number 3,039,424
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Issue date Jun 19, 1962
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G08 - SIGNALLING
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3039426
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Patent number 3,039,426
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Issue date Jun 19, 1962
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G08 - SIGNALLING
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3039425
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Patent number 3,039,425
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Issue date Jun 19, 1962
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G08 - SIGNALLING
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2979020
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Patent number 2,979,020
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Issue date Apr 11, 1961
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B60 - VEHICLES IN GENERAL
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2972138
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Patent number 2,972,138
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Issue date Feb 14, 1961
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G08 - SIGNALLING
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2843075
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Patent number 2,843,075
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Issue date Jul 15, 1958
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B60 - VEHICLES IN GENERAL