FR937959A - Improvements to telephone systems - Google Patents

Improvements to telephone systems

Info

Publication number
FR937959A
FR937959A FR937959DA FR937959A FR 937959 A FR937959 A FR 937959A FR 937959D A FR937959D A FR 937959DA FR 937959 A FR937959 A FR 937959A
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 Electric Laboratories Inc
Original Assignee
Automatic Electric Laboratories Inc
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 Electric Laboratories Inc filed Critical Automatic Electric Laboratories Inc
Application granted granted Critical
Publication of FR937959A publication Critical patent/FR937959A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
FR937959D 1940-05-16 1946-09-10 Improvements to telephone systems Expired FR937959A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US335560A US2246743A (en) 1940-05-16 1940-05-16 Telephone system

Publications (1)

Publication Number Publication Date
FR937959A true FR937959A (en) 1948-09-01

Family

ID=23312289

Family Applications (1)

Application Number Title Priority Date Filing Date
FR937959D Expired FR937959A (en) 1940-05-16 1946-09-10 Improvements to telephone systems

Country Status (3)

Country Link
US (1) US2246743A (en)
FR (1) FR937959A (en)
GB (1) GB549334A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2588686A (en) * 1940-04-01 1952-03-11 Automatic Elect Lab Telephone system providing operator service when all trunks are busy

Also Published As

Publication number Publication date
US2246743A (en) 1941-06-24
GB549334A (en) 1942-11-17

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