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ES420704A1
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Improvements in power amplifiers that comprise two transistors in push-pull assembly. (Machine-translation by Google Translate, not legally binding)
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ES403808A2
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Improvements in the construction of variable electrical condensers. (Machine-translation by Google Translate, not legally binding)
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ES399716A3
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Improvements in the construction of variable electrical condensers. (Machine-translation by Google Translate, not legally binding)
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ES380961A3
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Perfections in acoustic boxes for membrane loudspeakers. (Machine-translation by Google Translate, not legally binding)
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ES377356A1
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Improvements in the acoustic circuits of electrophonic transducers. (Machine-translation by Google Translate, not legally binding)
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ES364100A1
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Limiting mechanism of angular positions. (Machine-translation by Google Translate, not legally binding)
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ES361563A1
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Improvements in the construction of variable electrical condensers. (Machine-translation by Google Translate, not legally binding)
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ES361267A1
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Improvements in the construction of rotors for variable electric condensers. (Machine-translation by Google Translate, not legally binding)
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ES360595A1
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Mechanism of drive for variable electric condensers. (Machine-translation by Google Translate, not legally binding)
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ES335946A1
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Improvements in the manufacture of variable condensers. (Machine-translation by Google Translate, not legally binding)
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ES335578A3
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Improvements in the manufacture of variable condensers. (Machine-translation by Google Translate, not legally binding)
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