FR687123A - Improvements to telephone switchboards - Google Patents

Improvements to telephone switchboards

Info

Publication number
FR687123A
FR687123A FR687123DA FR687123A FR 687123 A FR687123 A FR 687123A FR 687123D A FR687123D A FR 687123DA FR 687123 A FR687123 A FR 687123A
Authority
FR
France
Prior art keywords
telephone switchboards
switchboards
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.)
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 FR687123A publication Critical patent/FR687123A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M5/00—Manual exchanges
    • H04M5/02—Constructional details

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
FR687123D 1929-01-08 1929-12-23 Improvements to telephone switchboards Expired FR687123A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL44410A NL27317C (en) 1929-01-08 1929-01-08

Publications (1)

Publication Number Publication Date
FR687123A true FR687123A (en) 1930-08-05

Family

ID=10388434

Family Applications (1)

Application Number Title Priority Date Filing Date
FR687123D Expired FR687123A (en) 1929-01-08 1929-12-23 Improvements to telephone switchboards

Country Status (4)

Country Link
BE (1) BE366151A (en)
FR (1) FR687123A (en)
GB (1) GB344023A (en)
NL (1) NL27317C (en)

Also Published As

Publication number Publication date
NL27317C (en) 1932-08-15
BE366151A (en) 1930-01-31
GB344023A (en) 1931-03-02

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