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Electronic temperature switch
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Patent number 10,693,290
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Issue date Jun 23, 2020
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HYDRA-ELECTRIC COMPANY
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Robert Andrew Guziak
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G05 - CONTROLLING REGULATING
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Electronic switch
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Patent number 10,677,846
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Issue date Jun 9, 2020
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HYDRA-ELECTRIC COMPANY
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Robert Andrew Guziak
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G01 - MEASURING TESTING
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Pressure switch system
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Patent number 10,600,595
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Issue date Mar 24, 2020
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HYDRA-ELECTRIC COMPANY
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John Chick Hong Tang
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H01 - BASIC ELECTRIC ELEMENTS
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Variable venturi flow switch
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Patent number 10,529,511
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Issue date Jan 7, 2020
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HYDRA-ELECTRIC COMPANY
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John Chick Hong Tang
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H01 - BASIC ELECTRIC ELEMENTS
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Variable venturi flow switch
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Patent number 9,978,549
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Issue date May 22, 2018
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HYDRA-ELECTRIC COMPANY
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John Chick Hong Tang
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H01 - BASIC ELECTRIC ELEMENTS
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Pressure switch system
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Patent number 9,966,211
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Issue date May 8, 2018
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HYDRA-ELECTRIC COMPANY
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John Chick Hong Tang
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H01 - BASIC ELECTRIC ELEMENTS
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85258380 - HYDRA-ELECTRIC SENSORS
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Serial number 85258380
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Filing date Mar 4, 2011
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Hydra-Electric Company
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9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
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72195668 - VISTASCOPE
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Serial number 72195668
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Registration number 785996
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Filing date Jun 15, 1964
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HYDRA-ELECTRIC COMPANY
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9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments