FR571485A - Improvements to telephone systems - Google Patents

Improvements to telephone systems

Info

Publication number
FR571485A
FR571485A FR571485DA FR571485A FR 571485 A FR571485 A FR 571485A FR 571485D A FR571485D A FR 571485DA FR 571485 A FR571485 A FR 571485A
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.)
Thales SA
Original Assignee
Le Materiel Telephonique Thomson CSF
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 Le Materiel Telephonique Thomson CSF filed Critical Le Materiel Telephonique Thomson CSF
Application granted granted Critical
Publication of FR571485A publication Critical patent/FR571485A/en
Expired legal-status Critical Current

Links

FR571485D 1923-01-29 1923-10-04 Improvements to telephone systems Expired FR571485A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB571485X 1923-01-29

Publications (1)

Publication Number Publication Date
FR571485A true FR571485A (en) 1924-05-17

Family

ID=10478488

Family Applications (1)

Application Number Title Priority Date Filing Date
FR571485D Expired FR571485A (en) 1923-01-29 1923-10-04 Improvements to telephone systems

Country Status (2)

Country Link
FR (1) FR571485A (en)
NL (1) NL15263C (en)

Also Published As

Publication number Publication date
NL15263C (en)

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