FR719383A - Improvements to telephone systems - Google Patents

Improvements to telephone systems

Info

Publication number
FR719383A
FR719383A FR719383DA FR719383A FR 719383 A FR719383 A FR 719383A FR 719383D A FR719383D A FR 719383DA FR 719383 A FR719383 A FR 719383A
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.)
Automatic Telephone Manufacturing Co Ltd
Original Assignee
Automatic Telephone Manufacturing Co Ltd
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 Automatic Telephone Manufacturing Co Ltd filed Critical Automatic Telephone Manufacturing Co Ltd
Application granted granted Critical
Publication of FR719383A publication Critical patent/FR719383A/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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
FR719383D 1930-06-18 1931-06-18 Improvements to telephone systems Expired FR719383A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB18651/30A GB357185A (en) 1930-06-18 1930-06-18 Improvements in or relating to automatic or semi-automatic telephone systems
GB719383X 1930-06-18

Publications (1)

Publication Number Publication Date
FR719383A true FR719383A (en) 1932-02-04

Family

ID=26253510

Family Applications (1)

Application Number Title Priority Date Filing Date
FR719383D Expired FR719383A (en) 1930-06-18 1931-06-18 Improvements to telephone systems

Country Status (2)

Country Link
FR (1) FR719383A (en)
GB (1) GB357185A (en)

Also Published As

Publication number Publication date
GB357185A (en) 1931-09-18

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