FR717621A - Improvements to automatic or semi-automatic telephone systems - Google Patents

Improvements to automatic or semi-automatic telephone systems

Info

Publication number
FR717621A
FR717621A FR717621DA FR717621A FR 717621 A FR717621 A FR 717621A FR 717621D A FR717621D A FR 717621DA FR 717621 A FR717621 A FR 717621A
Authority
FR
France
Prior art keywords
automatic
semi
telephone systems
automatic 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
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.)
Thales SA
Original Assignee
Le Materiel Telephonique Thomson CSF
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 Le Materiel Telephonique Thomson CSF filed Critical Le Materiel Telephonique Thomson CSF
Application granted granted Critical
Publication of FR717621A publication Critical patent/FR717621A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0016—Arrangements providing connection between exchanges

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
FR717621D 1930-05-30 1931-05-26 Improvements to automatic or semi-automatic telephone systems Expired FR717621A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB717621X 1930-05-30

Publications (1)

Publication Number Publication Date
FR717621A true FR717621A (en) 1932-01-12

Family

ID=10494730

Family Applications (1)

Application Number Title Priority Date Filing Date
FR717621D Expired FR717621A (en) 1930-05-30 1931-05-26 Improvements to automatic or semi-automatic telephone systems

Country Status (1)

Country Link
FR (1) FR717621A (en)

Similar Documents

Publication Publication Date Title
FR654067A (en) Improvements to automatic or semi-automatic telephone systems
FR711122A (en) Improvements to automatic or semi-automatic telephone systems
FR698488A (en) Improvements to automatic or semi-automatic telephone systems
FR687017A (en) Improvements to automatic or semi-automatic telephone systems
FR717621A (en) Improvements to automatic or semi-automatic telephone systems
FR722283A (en) Improvements to automatic or semi-automatic telephone systems
FR724229A (en) Improvements to automatic or semi-automatic telephone systems
FR693974A (en) Improvements to automatic or semi-automatic telephone systems
FR683358A (en) Improvements to automatic telephone systems
FR731952A (en) Improvements to automatic or semi-automatic telephone systems
FR736240A (en) Improvements to automatic or semi-automatic telephone systems
FR729482A (en) Improvements to automatic or semi-automatic telephone systems
FR614279A (en) Improvements to automatic or semi-automatic telephone systems
FR721579A (en) Improvements to automatic telephone systems
FR716329A (en) Improvements to automatic telephone systems
FR720315A (en) Improvements to automatic telephone systems
FR693979A (en) Improvements to automatic telephone systems
FR664862A (en) Improvements to automatic or semi-automatic telephone systems
FR659757A (en) Improvements to automatic or semi-automatic telephone systems
FR665397A (en) Improvements to automatic or semi-automatic telephone systems
FR679639A (en) Improvements to automatic or semi-automatic telephone systems
FR709444A (en) Improvements to semi-automatic telephone systems
FR722379A (en) Improvements to automatic and semi-automatic telephone systems
FR753279A (en) Improvements to automatic telephone systems
FR712321A (en) Improvements to telephone systems