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ES87640A1 - Improvements in telephone systems. - Google Patents

Improvements in telephone systems.

Info

Publication number
ES87640A1
ES87640A1 ES87640A ES87640A ES87640A1 ES 87640 A1 ES87640 A1 ES 87640A1 ES 87640 A ES87640 A ES 87640A ES 87640 A ES87640 A ES 87640A ES 87640 A1 ES87640 A1 ES 87640A1
Authority
ES
Spain
Prior art keywords
telephone systems
telephone
systems
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
ES87640A
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 ES87640A priority Critical patent/ES87640A1/en
Publication of ES87640A1 publication Critical patent/ES87640A1/en
Expired legal-status Critical Current

Links

ES87640A 1923-12-12 1923-12-12 Improvements in telephone systems. Expired ES87640A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ES87640A ES87640A1 (en) 1923-12-12 1923-12-12 Improvements in telephone systems.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES87640A ES87640A1 (en) 1923-12-12 1923-12-12 Improvements in telephone systems.

Publications (1)

Publication Number Publication Date
ES87640A1 true ES87640A1 (en) 1924-02-01

Family

ID=64252109

Family Applications (1)

Application Number Title Priority Date Filing Date
ES87640A Expired ES87640A1 (en) 1923-12-12 1923-12-12 Improvements in telephone systems.

Country Status (1)

Country Link
ES (1) ES87640A1 (en)

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