ES73057A1 - Improvements in semi-automatic telephone networks. - Google Patents

Improvements in semi-automatic telephone networks.

Info

Publication number
ES73057A1
ES73057A1 ES73057A ES73057A ES73057A1 ES 73057 A1 ES73057 A1 ES 73057A1 ES 73057 A ES73057 A ES 73057A ES 73057 A ES73057 A ES 73057A ES 73057 A1 ES73057 A1 ES 73057A1
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
ES73057A
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.)
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 ES73057A priority Critical patent/ES73057A1/en
Publication of ES73057A1 publication Critical patent/ES73057A1/en
Expired legal-status Critical Current

Links

ES73057A 1920-03-22 1920-03-22 Improvements in semi-automatic telephone networks. Expired ES73057A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ES73057A ES73057A1 (en) 1920-03-22 1920-03-22 Improvements in semi-automatic telephone networks.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES73057A ES73057A1 (en) 1920-03-22 1920-03-22 Improvements in semi-automatic telephone networks.

Publications (1)

Publication Number Publication Date
ES73057A1 true ES73057A1 (en) 1920-06-10

Family

ID=64242568

Family Applications (1)

Application Number Title Priority Date Filing Date
ES73057A Expired ES73057A1 (en) 1920-03-22 1920-03-22 Improvements in semi-automatic telephone networks.

Country Status (1)

Country Link
ES (1) ES73057A1 (en)

Similar Documents

Publication Publication Date Title
ES73057A1 (en) Improvements in semi-automatic telephone networks.
ES72977A1 (en) Semi-automatic telephone networks.
ES72975A1 (en) Improvements in networks or automatic telephone lines.
ES75526A1 (en) Improvements in telephones.
DK33616C (en) Line selector telephone.
ES75658A1 (en) Improvements in automatic and semi-automatic telephone lines.
ES76447A1 (en) Intercom telephone set.
ES73017A1 (en) Improvements in wireless telephone transmission.
AT89310B (en) Telephone switching system.
ES73279A1 (en) Improvements in automatic telephony.
ES72360A1 (en) Improvements in telephone transmitters.
ES72830A1 (en) Improvements in telephone transmitters.
DK34155C (en) Telephone system.
DK35484C (en) Telephone system.
DK36403C (en) Telephone system.
ES76927A1 (en) Improvements in telephones.
ES76926A1 (en) Improvements in telephones.
ES79730A1 (en) Improvements in telephones.
CH94633A (en) Submerged network.
DK30890C (en) Electric Ringer.
DK30840C (en) Electric Ringer.
ES75532A1 (en) Telephone device.
ES72473A1 (en) Improvements in telephone systems.
DK32829C (en) Telephone call system.
DK36519C (en) Fully or semi-automatic Telephone Exchange.