Improvements in Telephone Selecting Systems

11,274. Watkins, W. D. May 16. Telephone systems ; ; telephone calls.-In a party line system, two continuous line wires 1, 2, Fig. 1, are used, and the subscribers' instruments may be connected between these and the earth ; but, normally, each subscribers' bell 80 and receiver are disconne...

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Bibliographische Detailangaben

1. Verfasser:	WILLIAM DAVID WATKINS
Format:	Patent
Sprache:	eng
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