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FR489659A - Improvements in automatic telephony - Google Patents

Improvements in automatic telephony

Info

Publication number
FR489659A
FR489659A FR489659A FR489659DA FR489659A FR 489659 A FR489659 A FR 489659A FR 489659 A FR489659 A FR 489659A FR 489659D A FR489659D A FR 489659DA FR 489659 A FR489659 A FR 489659A
Authority
FR
France
Prior art keywords
automatic telephony
telephony
automatic
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
FR489659A
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 Francaise Thomson Houston SA
Original Assignee
Compagnie Francaise Thomson Houston SA
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 Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Application granted granted Critical
Publication of FR489659A publication Critical patent/FR489659A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
FR489659A 1917-04-14 1918-04-10 Improvements in automatic telephony Expired FR489659A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US161958A US1350882A (en) 1917-04-14 1917-04-14 Automatic telephone system

Publications (1)

Publication Number Publication Date
FR489659A true FR489659A (en) 1919-03-01

Family

ID=22583542

Family Applications (1)

Application Number Title Priority Date Filing Date
FR489659A Expired FR489659A (en) 1917-04-14 1918-04-10 Improvements in automatic telephony

Country Status (2)

Country Link
US (1) US1350882A (en)
FR (1) FR489659A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB516409A (en) * 1938-06-14 1940-01-01 Justin Erwin Pollak Improvements in or relating to automatic or semi-automatic telephone systems

Also Published As

Publication number Publication date
US1350882A (en) 1920-08-24

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