FR837587A - Secret telecommunications system - Google Patents

Secret telecommunications system

Info

Publication number
FR837587A
FR837587A FR837587DA FR837587A FR 837587 A FR837587 A FR 837587A FR 837587D A FR837587D A FR 837587DA FR 837587 A FR837587 A FR 837587A
Authority
FR
France
Prior art keywords
secret
telecommunications system
telecommunications
secret telecommunications
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.)
Compteurs Schlumberger SA
Original Assignee
Compteurs Schlumberger 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 Compteurs Schlumberger SA filed Critical Compteurs Schlumberger SA
Application granted granted Critical
Publication of FR837587A publication Critical patent/FR837587A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H04K1/02—Secret communication by adding a second signal to make the desired signal unintelligible

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
FR837587D 1938-05-06 1938-05-06 Secret telecommunications system Expired FR837587A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR837587T 1938-05-06

Publications (1)

Publication Number Publication Date
FR837587A true FR837587A (en) 1939-02-14

Family

ID=9298657

Family Applications (1)

Application Number Title Priority Date Filing Date
FR837587D Expired FR837587A (en) 1938-05-06 1938-05-06 Secret telecommunications system

Country Status (1)

Country Link
FR (1) FR837587A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2419568A (en) * 1943-07-16 1947-04-29 Standard Telephones Cables Ltd Transmission system
US2958827A (en) * 1943-09-02 1960-11-01 Warren A Anderson Electrical cancellation and indicating system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2419568A (en) * 1943-07-16 1947-04-29 Standard Telephones Cables Ltd Transmission system
US2958827A (en) * 1943-09-02 1960-11-01 Warren A Anderson Electrical cancellation and indicating system

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