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ES304049A1
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Improvements in the manufacture of quartz crystal devices (Machine-translation by Google Translate, not legally binding)
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ES288548A1
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Contactor device (Machine-translation by Google Translate, not legally binding)
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ES285049A1
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Apparatus and procedure for manufacturing cables (Machine-translation by Google Translate, not legally binding)
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ES283925A2
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Device for the regulation of a circuit (Machine-translation by Google Translate, not legally binding)
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ES283052A1
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Device for the regulation of a circuit (Machine-translation by Google Translate, not legally binding)
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ES271515A1
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Signal transmitter apparatus in telephone systems for modulation by encrypted impulses (Machine-translation by Google Translate, not legally binding)
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ES270372A1
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Signal receiver (Machine-translation by Google Translate, not legally binding)
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