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FR609976A - Improvements to telephone systems - Google Patents

Improvements to telephone systems

Info

Publication number
FR609976A
FR609976A FR609976DA FR609976A FR 609976 A FR609976 A FR 609976A FR 609976D A FR609976D A FR 609976DA FR 609976 A FR609976 A FR 609976A
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.)
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 FR609976A publication Critical patent/FR609976A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/08—Indicating faults in circuits or apparatus

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Time Recorders, Dirve Recorders, Access Control (AREA)
FR609976D 1925-11-20 1926-01-26 Improvements to telephone systems Expired FR609976A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2926725A GB266062A (en) 1925-11-20 1925-11-20 Improvements in or relating to telephone exchange systems

Publications (1)

Publication Number Publication Date
FR609976A true FR609976A (en) 1926-08-27

Family

ID=10288812

Family Applications (1)

Application Number Title Priority Date Filing Date
FR609976D Expired FR609976A (en) 1925-11-20 1926-01-26 Improvements to telephone systems

Country Status (2)

Country Link
FR (1) FR609976A (en)
GB (1) GB266062A (en)

Also Published As

Publication number Publication date
GB266062A (en) 1927-02-21

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