[go: up one dir, main page]

ES50652A1 - Improvements in telephone exchange systems. - Google Patents

Improvements in telephone exchange systems.

Info

Publication number
ES50652A1
ES50652A1 ES50652A ES50652A ES50652A1 ES 50652 A1 ES50652 A1 ES 50652A1 ES 50652 A ES50652 A ES 50652A ES 50652 A ES50652 A ES 50652A ES 50652 A1 ES50652 A1 ES 50652A1
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
ES50652A
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.)
CLEMENT EDWARD EDMUND
Original Assignee
CLEMENT EDWARD EDMUND
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 CLEMENT EDWARD EDMUND filed Critical CLEMENT EDWARD EDMUND
Priority to ES50652A priority Critical patent/ES50652A1/en
Publication of ES50652A1 publication Critical patent/ES50652A1/en
Expired legal-status Critical Current

Links

ES50652A 1911-06-05 1911-06-05 Improvements in telephone exchange systems. Expired ES50652A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ES50652A ES50652A1 (en) 1911-06-05 1911-06-05 Improvements in telephone exchange systems.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES50652A ES50652A1 (en) 1911-06-05 1911-06-05 Improvements in telephone exchange systems.

Publications (1)

Publication Number Publication Date
ES50652A1 true ES50652A1 (en) 1911-09-01

Family

ID=64227520

Family Applications (1)

Application Number Title Priority Date Filing Date
ES50652A Expired ES50652A1 (en) 1911-06-05 1911-06-05 Improvements in telephone exchange systems.

Country Status (1)

Country Link
ES (1) ES50652A1 (en)

Similar Documents

Publication Publication Date Title
ES50652A1 (en) Improvements in telephone exchange systems.
DK20370C (en) Telephone exchange system.
DK32848C (en) Telephone exchange system.
DK18626C (en) Telephone exchange system.
ES47130A1 (en) Improvements in automated telephone systems.
DK34938C (en) Telephone system.
DK21510C (en) Telephone exchange system.
DK19678C (en) Telephone system.
DK19937C (en) Telephone exchange connection.
AT82832B (en) Telephone switching system.
DK20429C (en) Device by Telephone Exchange Systems.
DK20519C (en) Device by Telephone Exchange Systems.
DK18997C (en) Telephone system.
DK22593C (en) Telephone system.
ES50853A1 (en) Improvements in printing telegraphy systems.
ES53153A1 (en) Improvements in telephone receivers.
ES51937A1 (en) Improvements in telephone receivers.
DK22408C (en) Telephone station.
DK19777C (en) Device by Telephone Exchange Systems.
DK20156C (en) Device by Telephone Exchange Systems.
DK20272C (en) Device by Telephone Exchange Systems.
DK20739C (en) Device by Telephone Exchange Systems.
ES52017A1 (en) Improvements in telephone transmissions.
ES54858A1 (en) Improvements in hydro-aeronautical devices.
ES61988A1 (en) Thermal telephones improvements.