FR899704A - Improvements to electrical intercommunication devices - Google Patents

Improvements to electrical intercommunication devices

Info

Publication number
FR899704A
FR899704A FR899704DA FR899704A FR 899704 A FR899704 A FR 899704A FR 899704D A FR899704D A FR 899704DA FR 899704 A FR899704 A FR 899704A
Authority
FR
France
Prior art keywords
intercommunication devices
electrical intercommunication
electrical
devices
intercommunication
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.)
ELECTRICITE ET DE RADIO SOC GE
Original Assignee
ELECTRICITE ET DE RADIO SOC GE
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 ELECTRICITE ET DE RADIO SOC GE filed Critical ELECTRICITE ET DE RADIO SOC GE
Application granted granted Critical
Publication of FR899704A publication Critical patent/FR899704A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/001—Two-way communication systems between a limited number of parties

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR899704D 1943-11-12 1943-11-12 Improvements to electrical intercommunication devices Expired FR899704A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR899704T 1943-11-12

Publications (1)

Publication Number Publication Date
FR899704A true FR899704A (en) 1945-06-08

Family

ID=9392388

Family Applications (1)

Application Number Title Priority Date Filing Date
FR899704D Expired FR899704A (en) 1943-11-12 1943-11-12 Improvements to electrical intercommunication devices

Country Status (2)

Country Link
BE (1) BE459234A (en)
FR (1) FR899704A (en)

Also Published As

Publication number Publication date
BE459234A (en)

Similar Documents

Publication Publication Date Title
FR938267A (en) Improvements relating to hearing aid devices
FR946287A (en) Improvements to television equipment
FR973327A (en) Improvements to filtering devices
FR1013673A (en) Improvements to facsimile devices
FR901117A (en) Improvements to taps
FR932188A (en) Improvements to electrical transmission devices
FR899704A (en) Improvements to electrical intercommunication devices
FR903203A (en) Gasifier
FR917884A (en) Improvements to combustion devices
FR939106A (en) Improvements to electro-acoustic converters
FR897089A (en) Improvements to insulators
FR915873A (en) Improvements to electrical control devices
FR951415A (en) Improvements to projection devices
FR949675A (en) Improvements to radar devices
FR904893A (en) Assembly of electrical devices
FR982457A (en) Improvements to gasifiers
FR978519A (en) Improvements to radiophotography devices
FR904766A (en) Cable gland
FR981252A (en) Improvements made to devices such as gazogenes
FR897696A (en) Gasifier
FR898814A (en) Gasifier
FR985425A (en) Improvements to writing devices
FR909447A (en) Improvements to recording devices
FR906217A (en) Improvements made to teletype devices
FR904037A (en) Improvements to electrical command transmitters