FR841895A - Systèmes de transmission à secret - Google Patents

Systèmes de transmission à secret

Info

Publication number
FR841895A
FR841895A FR841895DA FR841895A FR 841895 A FR841895 A FR 841895A FR 841895D A FR841895D A FR 841895DA FR 841895 A FR841895 A FR 841895A
Authority
FR
France
Prior art keywords
transmission systems
secret transmission
secret
systems
transmission
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
English (en)
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.)
Thales SA
Original Assignee
Le Materiel Telephonique Thomson CSF
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 Le Materiel Telephonique Thomson CSF filed Critical Le Materiel Telephonique Thomson CSF
Application granted granted Critical
Publication of FR841895A publication Critical patent/FR841895A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H04K1/04—Secret communication by frequency scrambling, i.e. by transposing or inverting parts of the frequency band or by inverting the whole band

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Relay Systems (AREA)
FR841895D 1937-08-11 1938-08-08 Systèmes de transmission à secret Expired FR841895A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US158464A US2179106A (en) 1937-08-11 1937-08-11 Secrecy signaling system

Publications (1)

Publication Number Publication Date
FR841895A true FR841895A (fr) 1939-05-31

Family

ID=22568249

Family Applications (1)

Application Number Title Priority Date Filing Date
FR841895D Expired FR841895A (fr) 1937-08-11 1938-08-08 Systèmes de transmission à secret

Country Status (6)

Country Link
US (1) US2179106A (instruction)
BE (2) BE516088A (instruction)
CH (1) CH225897A (instruction)
FR (1) FR841895A (instruction)
GB (1) GB516088A (instruction)
NL (1) NL64998C (instruction)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB595712A (en) * 1943-08-02 1947-12-15 Comm Engineering Pty Ltd Multi-channel telephone systems
US2490022A (en) * 1943-09-08 1949-12-06 Tung Sol Lamp Works Inc Secret signaling system
BE459652A (instruction) * 1944-05-08 1945-09-29
BE473802A (instruction) * 1946-08-20
US2535442A (en) * 1949-07-26 1950-12-26 James L A Mclaughlin Heterodyne eliminator communication system
US2609535A (en) * 1950-02-06 1952-09-02 Padevco Inc Multiplex frequency modulation system
US3011026A (en) * 1956-05-28 1961-11-28 Zenith Radio Corp Signal-translating apparatus

Also Published As

Publication number Publication date
BE429534A (instruction)
CH225897A (fr) 1943-02-28
BE516088A (instruction)
GB516088A (en) 1939-12-21
NL64998C (instruction)
US2179106A (en) 1939-11-07

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