CH225897A - Procédé de télécommunication à secret. - Google Patents

Procédé de télécommunication à secret.

Info

Publication number
CH225897A
CH225897A CH225897DA CH225897A CH 225897 A CH225897 A CH 225897A CH 225897D A CH225897D A CH 225897DA CH 225897 A CH225897 A CH 225897A
Authority
CH
Switzerland
Prior art keywords
telecommunication method
secret
secret telecommunication
telecommunication
Prior art date
Application number
Other languages
English (en)
French (fr)
Inventor
Bell Telephone Manufac Anonyme
Original Assignee
Bell Telephone Mfg
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 Bell Telephone Mfg filed Critical Bell Telephone Mfg
Publication of CH225897A publication Critical patent/CH225897A/fr

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)
  • Radio Relay Systems (AREA)
  • Mobile Radio Communication Systems (AREA)
CH225897D 1937-08-11 1938-08-11 Procédé de télécommunication à secret. CH225897A (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
CH225897A true CH225897A (fr) 1943-02-28

Family

ID=22568249

Family Applications (1)

Application Number Title Priority Date Filing Date
CH225897D CH225897A (fr) 1937-08-11 1938-08-11 Procédé de télécommunication à secret.

Country Status (6)

Country Link
US (1) US2179106A (en(2012))
BE (2) BE516088A (en(2012))
CH (1) CH225897A (en(2012))
FR (1) FR841895A (en(2012))
GB (1) GB516088A (en(2012))
NL (1) NL64998C (en(2012))

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 (en(2012)) * 1944-05-08 1945-09-29
BE473802A (en(2012)) * 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 (en(2012))
US2179106A (en) 1939-11-07
BE516088A (en(2012))
FR841895A (fr) 1939-05-31
GB516088A (en) 1939-12-21
NL64998C (en(2012))

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