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ES13574A1 - Improvements to acoustic telephones. - Google Patents

Improvements to acoustic telephones.

Info

Publication number
ES13574A1
ES13574A1 ES13574A ES13574A ES13574A1 ES 13574 A1 ES13574 A1 ES 13574A1 ES 13574 A ES13574 A ES 13574A ES 13574 A ES13574 A ES 13574A ES 13574 A1 ES13574 A1 ES 13574A1
Authority
ES
Spain
Prior art keywords
telephones
acoustic
acoustic telephones
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
ES13574A
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.)
Simpson Alfred Lisach
Original Assignee
Simpson Alfred Lisach
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 Simpson Alfred Lisach filed Critical Simpson Alfred Lisach
Priority to ES13574A priority Critical patent/ES13574A1/en
Publication of ES13574A1 publication Critical patent/ES13574A1/en
Expired legal-status Critical Current

Links

ES13574A 1892-07-26 1892-07-26 Improvements to acoustic telephones. Expired ES13574A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ES13574A ES13574A1 (en) 1892-07-26 1892-07-26 Improvements to acoustic telephones.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES13574A ES13574A1 (en) 1892-07-26 1892-07-26 Improvements to acoustic telephones.

Publications (1)

Publication Number Publication Date
ES13574A1 true ES13574A1 (en) 1892-09-01

Family

ID=64157103

Family Applications (1)

Application Number Title Priority Date Filing Date
ES13574A Expired ES13574A1 (en) 1892-07-26 1892-07-26 Improvements to acoustic telephones.

Country Status (1)

Country Link
ES (1) ES13574A1 (en)

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