ES57954A1 - Una disposición de bobinas autoinductoras para la carga de líneas telefónicas dobles duplicables según el sistema "Pupin".
- Google Patents
Una disposición de bobinas autoinductoras para la carga de líneas telefónicas dobles duplicables según el sistema "Pupin".
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PLEIJEL HENNING BERNHARD MATHIAS
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PLEIJEL HENNING BERNHARD MATHIAS
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ES57954A1914-04-131914-04-13Una disposición de bobinas autoinductoras para la carga de líneas telefónicas dobles duplicables según el sistema "Pupin".
ExpiredES57954A1
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