FR49014E - Improvements to telephone systems - Google Patents

Improvements to telephone systems

Info

Publication number
FR49014E
FR49014E FR49014DA FR49014E FR 49014 E FR49014 E FR 49014E FR 49014D A FR49014D A FR 49014DA FR 49014 E FR49014 E FR 49014E
Authority
FR
France
Prior art keywords
telephone systems
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.)
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 FR49014E publication Critical patent/FR49014E/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/60—Semi-automatic systems, i.e. in which the numerical selection of the outgoing line is under the control of an operator
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/58—Arrangements providing connection between main exchange and sub-exchange or satellite

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing (AREA)
FR49014D 1937-05-21 1937-05-21 Improvements to telephone systems Expired FR49014E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR49014T 1937-05-21

Publications (1)

Publication Number Publication Date
FR49014E true FR49014E (en) 1938-10-14

Family

ID=8684248

Family Applications (3)

Application Number Title Priority Date Filing Date
FR49951D Expired FR49951E (en) 1937-05-21
FR816805D Expired FR816805A (en) 1937-05-21 1936-04-21 Improvements to telephone systems
FR49014D Expired FR49014E (en) 1937-05-21 1937-05-21 Improvements to telephone systems

Family Applications Before (2)

Application Number Title Priority Date Filing Date
FR49951D Expired FR49951E (en) 1937-05-21
FR816805D Expired FR816805A (en) 1937-05-21 1936-04-21 Improvements to telephone systems

Country Status (1)

Country Link
FR (3) FR816805A (en)

Also Published As

Publication number Publication date
FR49951E (en) 1939-09-29
FR816805A (en) 1937-08-18

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