FR862540A - Loudspeaker systems - Google Patents

Loudspeaker systems

Info

Publication number
FR862540A
FR862540A FR862540DA FR862540A FR 862540 A FR862540 A FR 862540A FR 862540D A FR862540D A FR 862540DA FR 862540 A FR862540 A FR 862540A
Authority
FR
France
Prior art keywords
loudspeaker systems
loudspeaker
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 FR862540A publication Critical patent/FR862540A/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)
FR862540D 1939-01-03 1939-12-22 Loudspeaker systems Expired FR862540A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB862540X 1939-01-03

Publications (1)

Publication Number Publication Date
FR862540A true FR862540A (en) 1941-03-08

Family

ID=10606198

Family Applications (1)

Application Number Title Priority Date Filing Date
FR862540D Expired FR862540A (en) 1939-01-03 1939-12-22 Loudspeaker systems

Country Status (1)

Country Link
FR (1) FR862540A (en)

Similar Documents

Publication Publication Date Title
FR865522A (en) Improvements to telephone systems
FR867451A (en) Radio communications systems
FR887810A (en) Transmission systems
FR1019586A (en) Automatic facsimile systems
FR867847A (en) Directive radio systems
FR864516A (en) Loudspeaker Systems Improvements
FR848805A (en) Telecommunications systems
FR937957A (en) Radio-printer system
FR867452A (en) Directive radio systems
FR867663A (en) Modulator systems
FR50906E (en) Improvements to telephone systems
FR867359A (en) Radio communications systems
FR867449A (en) Transmission systems
FR864654A (en) Modulator systems
FR862540A (en) Loudspeaker systems
FR847620A (en) Telegraph systems
FR865888A (en) Multiple telegraph system
FR939445A (en) Telephone systems
FR868708A (en) Telecommunications systems
FR947133A (en) Telegraph systems
FR865590A (en) Communications systems
FR868229A (en) Radio guidance systems
FR931429A (en) Improvements to radio-telegraph systems
FR931904A (en) Improvements to telephone systems
FR836695A (en) Telegraph systems