FR906522A - Communication device - Google Patents

Communication device

Info

Publication number
FR906522A
FR906522A FR906522DA FR906522A FR 906522 A FR906522 A FR 906522A FR 906522D A FR906522D A FR 906522DA FR 906522 A FR906522 A FR 906522A
Authority
FR
France
Prior art keywords
communication device
communication
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.)
Sadir Carpentier SA
Original Assignee
Sadir Carpentier SA
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 Sadir Carpentier SA filed Critical Sadir Carpentier SA
Application granted granted Critical
Publication of FR906522A publication Critical patent/FR906522A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B13/00—Transmission systems characterised by the medium used for transmission, not provided for in groups H04B3/00 - H04B11/00
    • H04B13/02—Transmission systems in which the medium consists of the earth or a large mass of water thereon, e.g. earth telegraphy

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
FR906522D 1944-02-28 1944-02-28 Communication device Expired FR906522A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR906522T 1944-02-28

Publications (1)

Publication Number Publication Date
FR906522A true FR906522A (en) 1946-01-09

Family

ID=9405748

Family Applications (1)

Application Number Title Priority Date Filing Date
FR906522D Expired FR906522A (en) 1944-02-28 1944-02-28 Communication device

Country Status (1)

Country Link
FR (1) FR906522A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2621073A1 (en) * 1987-09-28 1989-03-31 Alsthom System for electromagnetic transmission of data through rocks, in particular from the bottom of a hole being drilled

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2621073A1 (en) * 1987-09-28 1989-03-31 Alsthom System for electromagnetic transmission of data through rocks, in particular from the bottom of a hole being drilled

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