FR469349A - Microphone device for amplifying and recording radiotelegraph signals - Google Patents

Microphone device for amplifying and recording radiotelegraph signals

Info

Publication number
FR469349A
FR469349A FR469349A FR469349DA FR469349A FR 469349 A FR469349 A FR 469349A FR 469349 A FR469349 A FR 469349A FR 469349D A FR469349D A FR 469349DA FR 469349 A FR469349 A FR 469349A
Authority
FR
France
Prior art keywords
radiotelegraph
amplifying
recording
signals
microphone device
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
FR469349A
Other languages
French (fr)
Inventor
Fernand-Laurent-Edmond-Joseph Charron
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.)
FERNAND LAURENT EDMOND JOSEPH
Original Assignee
FERNAND LAURENT EDMOND JOSEPH
Filing date
Publication date
Application filed by FERNAND LAURENT EDMOND JOSEPH filed Critical FERNAND LAURENT EDMOND JOSEPH
Application granted granted Critical
Publication of FR469349A publication Critical patent/FR469349A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L15/00—Apparatus or local circuits for transmitting or receiving dot-and-dash codes, e.g. Morse code
    • H04L15/24—Apparatus or circuits at the receiving end
    • H04L15/28—Code reproducing apparatus
    • H04L15/30—Writing recorders

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
FR469349A 1914-03-03 Microphone device for amplifying and recording radiotelegraph signals Expired FR469349A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR19157T

Publications (1)

Publication Number Publication Date
FR469349A true FR469349A (en) 1914-07-29

Family

ID=8660055

Family Applications (2)

Application Number Title Priority Date Filing Date
FR19157A Expired FR19157E (en) Microphone device for amplifying and recording radiotelegraph signals
FR469349A Expired FR469349A (en) 1914-03-03 Microphone device for amplifying and recording radiotelegraph signals

Family Applications Before (1)

Application Number Title Priority Date Filing Date
FR19157A Expired FR19157E (en) Microphone device for amplifying and recording radiotelegraph signals

Country Status (1)

Country Link
FR (2) FR469349A (en)

Also Published As

Publication number Publication date
FR19157E (en) 1914-11-04

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