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Water level alarm
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David W. Esposito
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G08 - SIGNALLING
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3794847
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B60 - VEHICLES IN GENERAL
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3442217
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Patent number 3,442,217
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H01 - BASIC ELECTRIC ELEMENTS
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2617972
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Patent number 2,617,972
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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1881878
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Patent number 1,881,878
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Issue date Oct 11, 1932
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B64 - AIRCRAFT AVIATION COSMONAUTICS
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1548366
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Patent number 1,548,366
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G01 - MEASURING TESTING
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1536393
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Patent number 1,536,393
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B60 - VEHICLES IN GENERAL
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1327262
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Patent number 1,327,262
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E03 - WATER SUPPLY SEWERAGE
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1306702
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Patent number 1,306,702
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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1285986
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Patent number 1,285,986
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G01 - MEASURING TESTING
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1280116
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H01 - BASIC ELECTRIC ELEMENTS
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1262391
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Patent number 1,262,391
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H01 - BASIC ELECTRIC ELEMENTS
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1237470
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Patent number 1,237,470
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G01 - MEASURING TESTING
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1236381
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Patent number 1,236,381
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B60 - VEHICLES IN GENERAL
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1153314
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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759449
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Patent number 759,449
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G10 - MUSICAL INSTRUMENTS ACOUSTICS