FR374410A - Apparatus for establishing telephone communications over telegraph lines or railway signals - Google Patents

Apparatus for establishing telephone communications over telegraph lines or railway signals

Info

Publication number
FR374410A
FR374410A FR374410DA FR374410A FR 374410 A FR374410 A FR 374410A FR 374410D A FR374410D A FR 374410DA FR 374410 A FR374410 A FR 374410A
Authority
FR
France
Prior art keywords
communications over
telephone communications
railway signals
telegraph lines
establishing 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)
Inventor
Gaston-Auguste-Joseph Burghardt
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.)
GASTON AUGUSTE JOSEPH BURGHARD
Original Assignee
GASTON AUGUSTE JOSEPH BURGHARD
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 GASTON AUGUSTE JOSEPH BURGHARD filed Critical GASTON AUGUSTE JOSEPH BURGHARD
Application granted granted Critical
Publication of FR374410A publication Critical patent/FR374410A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
FR374410D 1907-02-08 1907-02-08 Apparatus for establishing telephone communications over telegraph lines or railway signals Expired FR374410A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR374410T 1907-02-08

Publications (1)

Publication Number Publication Date
FR374410A true FR374410A (en) 1907-06-12

Family

ID=1421053

Family Applications (1)

Application Number Title Priority Date Filing Date
FR374410D Expired FR374410A (en) 1907-02-08 1907-02-08 Apparatus for establishing telephone communications over telegraph lines or railway signals

Country Status (1)

Country Link
FR (1) FR374410A (en)

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