Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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SHAFFER WILLIAM CASS
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SHAFFER WILLIAM CASS
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Publication date
Application filed by SHAFFER WILLIAM CASSfiledCriticalSHAFFER WILLIAM CASS
Priority to ES2080ApriorityCriticalpatent/ES2080A1/es
Publication of ES2080A1publicationCriticalpatent/ES2080A1/es
ES2080A1881-12-131881-12-13Aparatos eléctricos mejorados para pasar los trenes de ferrocarriles, hacer señales y para otros fines análogos.
ExpiredES2080A1
(es)
Mejoras en montajes para facilitar la transmisión de señales por los pasajeros en los coches de ferrocarriles, a los conductores o guardas de los trenes.