ES90994A1 - Improvements in telephone exchange systems. - Google Patents

Improvements in telephone exchange systems.

Info

Publication number
ES90994A1
ES90994A1 ES90994A ES90994A ES90994A1 ES 90994 A1 ES90994 A1 ES 90994A1 ES 90994 A ES90994 A ES 90994A ES 90994 A ES90994 A ES 90994A ES 90994 A1 ES90994 A1 ES 90994A1
Authority
ES
Spain
Prior art keywords
telephone exchange
exchange systems
systems
telephone
exchange
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
ES90994A
Other languages
Spanish (es)
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.)
Telefonos Bell SA
Original Assignee
Telefonos Bell SA
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 Telefonos Bell SA filed Critical Telefonos Bell SA
Priority to ES90994A priority Critical patent/ES90994A1/en
Publication of ES90994A1 publication Critical patent/ES90994A1/en
Expired legal-status Critical Current

Links

ES90994A 1924-10-06 1924-10-06 Improvements in telephone exchange systems. Expired ES90994A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ES90994A ES90994A1 (en) 1924-10-06 1924-10-06 Improvements in telephone exchange systems.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES90994A ES90994A1 (en) 1924-10-06 1924-10-06 Improvements in telephone exchange systems.

Publications (1)

Publication Number Publication Date
ES90994A1 true ES90994A1 (en) 1924-11-16

Family

ID=64254831

Family Applications (1)

Application Number Title Priority Date Filing Date
ES90994A Expired ES90994A1 (en) 1924-10-06 1924-10-06 Improvements in telephone exchange systems.

Country Status (1)

Country Link
ES (1) ES90994A1 (en)

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