FR539603A - Two-cylinder telephonograph - Google Patents

Two-cylinder telephonograph

Info

Publication number
FR539603A
FR539603A FR539603DA FR539603A FR 539603 A FR539603 A FR 539603A FR 539603D A FR539603D A FR 539603DA FR 539603 A FR539603 A FR 539603A
Authority
FR
France
Prior art keywords
telephonograph
cylinder
cylinder telephonograph
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.)
TELEGRAPHON GmbH
Original Assignee
TELEGRAPHON GmbH
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 TELEGRAPHON GmbH filed Critical TELEGRAPHON GmbH
Application granted granted Critical
Publication of FR539603A publication Critical patent/FR539603A/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
    • H04M1/64—Automatic arrangements for answering calls; Automatic arrangements for recording messages for absent subscribers; Arrangements for recording conversations
    • H04M1/65—Recording arrangements for recording a message from the calling party

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Drawing Aids And Blackboards (AREA)
FR539603D 1920-08-25 1921-08-23 Two-cylinder telephonograph Expired FR539603A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE342901T 1920-08-25

Publications (1)

Publication Number Publication Date
FR539603A true FR539603A (en) 1922-06-28

Family

ID=33459956

Family Applications (1)

Application Number Title Priority Date Filing Date
FR539603D Expired FR539603A (en) 1920-08-25 1921-08-23 Two-cylinder telephonograph

Country Status (3)

Country Link
DE (1) DE342901C (en)
FR (1) FR539603A (en)
GB (1) GB168305A (en)

Also Published As

Publication number Publication date
GB168305A (en) 1922-03-02
DE342901C (en) 1921-10-25

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