FR720315A - Improvements to automatic telephone systems - Google Patents

Improvements to automatic telephone systems

Info

Publication number
FR720315A
FR720315A FR720315DA FR720315A FR 720315 A FR720315 A FR 720315A FR 720315D A FR720315D A FR 720315DA FR 720315 A FR720315 A FR 720315A
Authority
FR
France
Prior art keywords
telephone systems
automatic telephone
automatic
systems
telephone
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
Other languages
French (fr)
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.)
Compagnie des Telephones Thomson Houston
Original Assignee
Compagnie des Telephones Thomson Houston
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 Compagnie des Telephones Thomson Houston filed Critical Compagnie des Telephones Thomson Houston
Application granted granted Critical
Publication of FR720315A publication Critical patent/FR720315A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q3/00Selecting arrangements
    • H04Q3/0016Arrangements providing connection between exchanges

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
FR720315D 1930-10-17 1930-10-17 Improvements to automatic telephone systems Expired FR720315A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR720315T 1930-10-17

Publications (1)

Publication Number Publication Date
FR720315A true FR720315A (en) 1932-02-18

Family

ID=9092728

Family Applications (1)

Application Number Title Priority Date Filing Date
FR720315D Expired FR720315A (en) 1930-10-17 1930-10-17 Improvements to automatic telephone systems

Country Status (1)

Country Link
FR (1) FR720315A (en)

Similar Documents

Publication Publication Date Title
FR721123A (en) Improvements to telephone systems
FR726873A (en) Improvements to telephone systems
FR733139A (en) Improvements to telephone systems
FR683358A (en) Improvements to automatic telephone systems
FR721579A (en) Improvements to automatic telephone systems
FR720315A (en) Improvements to automatic telephone systems
FR693979A (en) Improvements to automatic telephone systems
FR716329A (en) Improvements to automatic telephone systems
FR728626A (en) Improvements to telephone systems
FR712321A (en) Improvements to telephone systems
FR726757A (en) Improvements to telephone systems
FR715391A (en) Improvements to telephone systems
FR719383A (en) Improvements to telephone systems
FR720490A (en) Improvements to telephone systems
FR726748A (en) Improvements to telephone systems
FR710356A (en) Improvements to telephone systems
FR707756A (en) Improvements to automatic telephone systems
FR707755A (en) Improvements to automatic telephone systems
FR708668A (en) Improvements to automatic telephone systems
FR708703A (en) Improvements to automatic telephone systems
FR725229A (en) Improvements to telephone systems
FR709444A (en) Improvements to semi-automatic telephone systems
FR726997A (en) Improvements to telegraph systems
FR739532A (en) Improvements to automatic telephone systems
FR40822E (en) Improvements to automatic telephone systems