FR486972A - Central station, for automatic telephone - Google Patents

Central station, for automatic telephone

Info

Publication number
FR486972A
FR486972A FR486972DA FR486972A FR 486972 A FR486972 A FR 486972A FR 486972D A FR486972D A FR 486972DA FR 486972 A FR486972 A FR 486972A
Authority
FR
France
Prior art keywords
central station
automatic telephone
telephone
automatic
station
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)
Inventor
Alton E Stevens
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of FR486972A publication Critical patent/FR486972A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/002—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR486972D 1917-09-13 1917-09-13 Central station, for automatic telephone Expired FR486972A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR486972T 1917-09-13

Publications (1)

Publication Number Publication Date
FR486972A true FR486972A (en) 1918-05-21

Family

ID=1523529

Family Applications (1)

Application Number Title Priority Date Filing Date
FR486972D Expired FR486972A (en) 1917-09-13 1917-09-13 Central station, for automatic telephone

Country Status (1)

Country Link
FR (1) FR486972A (en)

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