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jan 8, 1928 - Sistema de radio móvil AM unidireccional inventado para la policía.

Description:

El patrullero del Departamento de Policía de Detroit, Kenneth Cox, y el estudiante de ingeniería, Robert L. Batts, crearon una forma para que la policía reciba llamadas de emergencia en sus patrullas.

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Byivan salviulo
30 Mar 2022
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Date:

jan 8, 1928
Now
~ 97 years ago
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