ES72473A1 - Improvements in telephone systems. - Google Patents

Improvements in telephone systems.

Info

Publication number
ES72473A1
ES72473A1 ES72473A ES72473A ES72473A1 ES 72473 A1 ES72473 A1 ES 72473A1 ES 72473 A ES72473 A ES 72473A ES 72473 A ES72473 A ES 72473A ES 72473 A1 ES72473 A1 ES 72473A1
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
ES72473A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to ES72473A priority Critical patent/ES72473A1/en
Publication of ES72473A1 publication Critical patent/ES72473A1/en
Expired legal-status Critical Current

Links

ES72473A 1920-02-02 1920-02-02 Improvements in telephone systems. Expired ES72473A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ES72473A ES72473A1 (en) 1920-02-02 1920-02-02 Improvements in telephone systems.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES72473A ES72473A1 (en) 1920-02-02 1920-02-02 Improvements in telephone systems.

Publications (1)

Publication Number Publication Date
ES72473A1 true ES72473A1 (en) 1920-04-28

Family

ID=64242271

Family Applications (1)

Application Number Title Priority Date Filing Date
ES72473A Expired ES72473A1 (en) 1920-02-02 1920-02-02 Improvements in telephone systems.

Country Status (1)

Country Link
ES (1) ES72473A1 (en)

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