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3886388
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H01 - BASIC ELECTRIC ELEMENTS
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3784862
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H01 - BASIC ELECTRIC ELEMENTS
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3737709
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Patent number 3,737,709
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H01 - BASIC ELECTRIC ELEMENTS
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3082174
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H01 - BASIC ELECTRIC ELEMENTS
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2944179
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Patent number 2,944,179
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H01 - BASIC ELECTRIC ELEMENTS
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2881909
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H01 - BASIC ELECTRIC ELEMENTS
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2862133
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Patent number 2,862,133
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H01 - BASIC ELECTRIC ELEMENTS
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2855368
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Patent number 2,855,368
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H01 - BASIC ELECTRIC ELEMENTS
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2680206
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Patent number 2,680,206
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H01 - BASIC ELECTRIC ELEMENTS
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2607901
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H01 - BASIC ELECTRIC ELEMENTS
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2556254
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Patent number 2,556,254
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H01 - BASIC ELECTRIC ELEMENTS
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2482043
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H01 - BASIC ELECTRIC ELEMENTS
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2156974
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H01 - BASIC ELECTRIC ELEMENTS
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H01 - BASIC ELECTRIC ELEMENTS
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1653366
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H01 - BASIC ELECTRIC ELEMENTS
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1529597
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H01 - BASIC ELECTRIC ELEMENTS
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1527932
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G01 - MEASURING TESTING