IE12270L - Telephone signalling systems. - Google Patents

Telephone signalling systems.

Info

Publication number
IE12270L
IE12270L IE12270DA IE12270L IE 12270 L IE12270 L IE 12270L IE 12270D A IE12270D A IE 12270DA IE 12270 L IE12270 L IE 12270L
Authority
IE
Ireland
Prior art keywords
signalling systems
telephone signalling
telephone
systems
signalling
Prior art date
Application number
Original Assignee
Electrical Res Prod Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Electrical Res Prod Inc filed Critical Electrical Res Prod Inc
Publication of IE12270L publication Critical patent/IE12270L/en

Links

IE12270D 1930-09-10 1930-09-10 Telephone signalling systems. IE12270L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IE12270T 1930-09-10

Publications (1)

Publication Number Publication Date
IE12270L true IE12270L (en) 1931-03-10

Family

ID=11023928

Family Applications (1)

Application Number Title Priority Date Filing Date
IE12270D IE12270L (en) 1930-09-10 1930-09-10 Telephone signalling systems.

Country Status (1)

Country Link
IE (1) IE12270L (en)

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