FR500917A - Improvements to automatic telephone systems - Google Patents

Improvements to automatic telephone systems

Info

Publication number
FR500917A
FR500917A FR500917DA FR500917A FR 500917 A FR500917 A FR 500917A FR 500917D A FR500917D A FR 500917DA FR 500917 A FR500917 A FR 500917A
Authority
FR
France
Prior art keywords
telephone systems
automatic telephone
automatic
systems
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.)
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 FR500917A publication Critical patent/FR500917A/en
Expired legal-status Critical Current

Links

FR500917D 1916-02-28 1917-02-19 Improvements to automatic telephone systems Expired FR500917A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US500917XA 1916-02-28 1916-02-28

Publications (1)

Publication Number Publication Date
FR500917A true FR500917A (en) 1920-03-27

Family

ID=43479322

Family Applications (1)

Application Number Title Priority Date Filing Date
FR500917D Expired FR500917A (en) 1916-02-28 1917-02-19 Improvements to automatic telephone systems

Country Status (1)

Country Link
FR (1) FR500917A (en)

Similar Documents

Publication Publication Date Title
FR500065A (en) Improvements to automatic telephone systems
FR486962A (en) Improvements to automatic telephone systems
FR500917A (en) Improvements to automatic telephone systems
FR487185A (en) Improvements to automatic telephone systems
FR487197A (en) Improvements to automatic telephone systems
FR490502A (en) Improvements to automatic telephone systems
FR490504A (en) Improvements to automatic telephone systems
FR487308A (en) Improvements to automatic telephone systems
FR487064A (en) Improvements to automatic telephone systems
FR487962A (en) Improvements to automatic telephone systems
FR21138E (en) Improvements to automatic telephone systems
FR492272A (en) Improvements to automatic telephone systems
FR487181A (en) Improvements to long distance automatic telephone systems
FR20783E (en) Improvements to automatic telephone systems
FR489328A (en) Improvements to automatic telephone systems
FR513797A (en) Improvements to automatic telephone systems
FR502371A (en) Improvements to automatic telephone systems
FR500934A (en) Improvements to automatic telephone systems
FR490270A (en) Improvements to automatic telephone systems
FR490134A (en) Improvements to automatic telephone systems
FR489660A (en) Improvements to automatic telephone systems
FR516356A (en) Improvements to automatic telephone systems
FR488500A (en) Improvements to automatic telephone systems
FR487174A (en) Improvements to automatic telephone systems with shared lines
FR505077A (en) Improvements to automatic telephone systems with shared lines