FR877937A - Indoor telephone system - Google Patents

Indoor telephone system

Info

Publication number
FR877937A
FR877937A FR877937DA FR877937A FR 877937 A FR877937 A FR 877937A FR 877937D A FR877937D A FR 877937DA FR 877937 A FR877937 A FR 877937A
Authority
FR
France
Prior art keywords
telephone system
indoor telephone
indoor
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.)
Mix und Genest AG
Original Assignee
Mix und Genest AG
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 Mix und Genest AG filed Critical Mix und Genest AG
Application granted granted Critical
Publication of FR877937A publication Critical patent/FR877937A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/40—Applications of speech amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR877937D 1940-12-23 1941-12-20 Indoor telephone system Expired FR877937A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE877937X 1940-12-23

Publications (1)

Publication Number Publication Date
FR877937A true FR877937A (en) 1943-01-06

Family

ID=6818297

Family Applications (1)

Application Number Title Priority Date Filing Date
FR877937D Expired FR877937A (en) 1940-12-23 1941-12-20 Indoor telephone system

Country Status (1)

Country Link
FR (1) FR877937A (en)

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