FR905007A - Installation for duplex conversations - Google Patents

Installation for duplex conversations

Info

Publication number
FR905007A
FR905007A FR905007DA FR905007A FR 905007 A FR905007 A FR 905007A FR 905007D A FR905007D A FR 905007DA FR 905007 A FR905007 A FR 905007A
Authority
FR
France
Prior art keywords
installation
duplex conversations
conversations
duplex
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.)
Telefunken AG
Original Assignee
Telefunken AG
Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH
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 Telefunken AG, Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH filed Critical Telefunken AG
Application granted granted Critical
Publication of FR905007A publication Critical patent/FR905007A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR905007D 1943-05-07 1944-06-13 Installation for duplex conversations Expired FR905007A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE905007X 1943-05-07

Publications (1)

Publication Number Publication Date
FR905007A true FR905007A (en) 1945-11-22

Family

ID=6862088

Family Applications (1)

Application Number Title Priority Date Filing Date
FR905007D Expired FR905007A (en) 1943-05-07 1944-06-13 Installation for duplex conversations

Country Status (2)

Country Link
CH (1) CH252031A (en)
FR (1) FR905007A (en)

Also Published As

Publication number Publication date
CH252031A (en) 1947-11-30

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