ES72977A1 - Redes telefónicas semi-automáticas. - Google Patents

Redes telefónicas semi-automáticas.

Info

Publication number
ES72977A1
ES72977A1 ES72977A ES72977A ES72977A1 ES 72977 A1 ES72977 A1 ES 72977A1 ES 72977 A ES72977 A ES 72977A ES 72977 A ES72977 A ES 72977A ES 72977 A1 ES72977 A1 ES 72977A1
Authority
ES
Spain
Prior art keywords
semi
telephone networks
automatic telephone
automatic
networks
Prior art date
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.)
Expired
Application number
ES72977A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Automatic Electric Co
Original Assignee
Automatic Electric Co
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 Automatic Electric Co filed Critical Automatic Electric Co
Priority to ES72977A priority Critical patent/ES72977A1/es
Publication of ES72977A1 publication Critical patent/ES72977A1/es
Expired legal-status Critical Current

Links

ES72977A 1920-03-15 1920-03-15 Redes telefónicas semi-automáticas. Expired ES72977A1 (es)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ES72977A ES72977A1 (es) 1920-03-15 1920-03-15 Redes telefónicas semi-automáticas.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES72977A ES72977A1 (es) 1920-03-15 1920-03-15 Redes telefónicas semi-automáticas.

Publications (1)

Publication Number Publication Date
ES72977A1 true ES72977A1 (es) 1920-05-25

Family

ID=64243990

Family Applications (1)

Application Number Title Priority Date Filing Date
ES72977A Expired ES72977A1 (es) 1920-03-15 1920-03-15 Redes telefónicas semi-automáticas.

Country Status (1)

Country Link
ES (1) ES72977A1 (es)

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