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3900760
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H01 - BASIC ELECTRIC ELEMENTS
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3376447
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H01 - BASIC ELECTRIC ELEMENTS
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3325777
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G02 - OPTICS
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3307061
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H01 - BASIC ELECTRIC ELEMENTS
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2753483
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H01 - BASIC ELECTRIC ELEMENTS
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2726352
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H01 - BASIC ELECTRIC ELEMENTS
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2654048
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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2598612
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Issue date May 27, 1952
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H01 - BASIC ELECTRIC ELEMENTS
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2598401
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Issue date May 27, 1952
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H01 - BASIC ELECTRIC ELEMENTS
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2596061
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H01 - BASIC ELECTRIC ELEMENTS
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2595854
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Patent number 2,595,854
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H01 - BASIC ELECTRIC ELEMENTS
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2572644
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H01 - BASIC ELECTRIC ELEMENTS
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2550316
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H01 - BASIC ELECTRIC ELEMENTS
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2506741
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H01 - BASIC ELECTRIC ELEMENTS
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2415842
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H01 - BASIC ELECTRIC ELEMENTS
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2414881
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H01 - BASIC ELECTRIC ELEMENTS
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2407905
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H01 - BASIC ELECTRIC ELEMENTS
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2407906
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Patent number 2,407,906
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Issue date Sep 17, 1946
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H01 - BASIC ELECTRIC ELEMENTS
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2407485
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H01 - BASIC ELECTRIC ELEMENTS
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2380505
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H01 - BASIC ELECTRIC ELEMENTS
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2377972
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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2345282
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H01 - BASIC ELECTRIC ELEMENTS
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2339833
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H01 - BASIC ELECTRIC ELEMENTS
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2324505
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H01 - BASIC ELECTRIC ELEMENTS
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2324504
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H01 - BASIC ELECTRIC ELEMENTS
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2322807
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H01 - BASIC ELECTRIC ELEMENTS
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2314648
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H01 - BASIC ELECTRIC ELEMENTS
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2304091
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H01 - BASIC ELECTRIC ELEMENTS
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2288402
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H01 - BASIC ELECTRIC ELEMENTS
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2266621
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H01 - BASIC ELECTRIC ELEMENTS