FR853385A - Improvements to telephone systems - Google Patents

Improvements to telephone systems

Info

Publication number
FR853385A
FR853385A FR853385DA FR853385A FR 853385 A FR853385 A FR 853385A FR 853385D A FR853385D A FR 853385DA FR 853385 A FR853385 A FR 853385A
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.)
Compagnie des Telephones Thomson Houston
Original Assignee
Compagnie des Telephones Thomson Houston
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 Compagnie des Telephones Thomson Houston filed Critical Compagnie des Telephones Thomson Houston
Application granted granted Critical
Publication of FR853385A publication Critical patent/FR853385A/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
    • H04Q3/62—Arrangements providing connection between main exchange and sub-exchange or satellite for connecting to private branch exchanges
    • H04Q3/625—Arrangements in the private branch exchange
FR853385D 1938-11-03 1938-11-03 Improvements to telephone systems Expired FR853385A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR853385T 1938-11-03

Publications (1)

Publication Number Publication Date
FR853385A true FR853385A (en) 1940-03-18

Family

ID=9327048

Family Applications (1)

Application Number Title Priority Date Filing Date
FR853385D Expired FR853385A (en) 1938-11-03 1938-11-03 Improvements to telephone systems

Country Status (2)

Country Link
US (1) US2426196A (en)
FR (1) FR853385A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2787667A (en) * 1955-10-04 1957-04-02 Int Standard Electric Corp Apartment satellite circuits

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1812222A (en) * 1929-06-06 1931-06-30 Siemens Ag Telephone system
US2056752A (en) * 1933-12-29 1936-10-06 Associated Electric Lab Inc Automatic telephone system
GB513008A (en) * 1938-03-29 1939-10-02 Justin Erwin Pollak Improvements in or relating to telephone systems
US2277441A (en) * 1940-07-05 1942-03-24 Bell Telephone Labor Inc Telephone system

Also Published As

Publication number Publication date
US2426196A (en) 1947-08-26

Similar Documents

Publication Publication Date Title
FR865522A (en) Improvements to telephone systems
FR856153A (en) Improvements to telephone systems
FR861968A (en) Improvements to television systems
FR50613E (en) Improvements to television systems
FR933317A (en) Improvements to radio-telegraph systems
FR831620A (en) Improvements to telephone systems
FR951758A (en) Improvements to telephone systems
FR858896A (en) Improvements to electro-magnetic systems
FR854039A (en) Improvements to telephone systems
FR847613A (en) Stylograph refinements
FR932189A (en) Improvements to telephone systems
FR851173A (en) Improvements to modulation systems
FR840325A (en) Improvements to telephone systems
FR853385A (en) Improvements to telephone systems
FR49158E (en) Improvements to telephone systems
FR842110A (en) Improvements to telephone systems
FR841582A (en) Improvements to telephone systems
FR931904A (en) Improvements to telephone systems
FR838511A (en) Improvements to telephone systems
FR847279A (en) Improvements to telephone systems
FR850177A (en) Improvements to telecommunications systems
FR937959A (en) Improvements to telephone systems
FR931429A (en) Improvements to radio-telegraph systems
FR852985A (en) Improvements to automatic telephone systems
FR861824A (en) Improvements to telephone systems