NL7401441A - - Google Patents

Info

Publication number
NL7401441A
NL7401441A NL7401441A NL7401441A NL7401441A NL 7401441 A NL7401441 A NL 7401441A NL 7401441 A NL7401441 A NL 7401441A NL 7401441 A NL7401441 A NL 7401441A NL 7401441 A NL7401441 A NL 7401441A
Authority
NL
Netherlands
Application number
NL7401441A
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 filed Critical
Publication of NL7401441A publication Critical patent/NL7401441A/xx

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
NL7401441A 1973-02-13 1974-02-01 NL7401441A (xx)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH202673A CH574692A5 (xx) 1973-02-13 1973-02-13

Publications (1)

Publication Number Publication Date
NL7401441A true NL7401441A (xx) 1974-08-15

Family

ID=4224178

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7401441A NL7401441A (xx) 1973-02-13 1974-02-01

Country Status (11)

Country Link
JP (1) JPS49119502A (xx)
CA (1) CA1003137A (xx)
CH (1) CH574692A5 (xx)
DE (1) DE2318489C3 (xx)
FR (1) FR2217875B1 (xx)
GB (1) GB1465393A (xx)
IT (1) IT1019573B (xx)
NL (1) NL7401441A (xx)
NO (1) NO140401C (xx)
SE (1) SE392556B (xx)
ZA (1) ZA74916B (xx)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2318247C3 (de) * 1973-04-11 1981-03-26 Siemens AG, 1000 Berlin und 8000 München Einrichtung zur verschleierten Übertragung von Sprachsignalen
JPS5824984B2 (ja) * 1976-06-02 1983-05-24 三菱電機株式会社 秘話装置

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1620656A (en) * 1924-12-01 1927-03-15 Western Electric Co Carrier-wave signaling system
US3201517A (en) * 1944-04-12 1965-08-17 Bell Telephone Labor Inc Privacy communication system
FR977153A (fr) * 1948-10-27 1951-03-28 Radio Electr Soc Fr Système de communication téléphonique à secret
FR1169671A (fr) * 1957-03-08 1959-01-05 Thomson Houston Comp Francaise Perfectionnements aux systèmes de communications téléphoniques
CH361597A (de) * 1958-08-23 1962-04-30 Patelhold Patentverwertung Verfahren zur Verschleierung von Nachrichtensignalen
US3225142A (en) * 1961-12-18 1965-12-21 Bell Telephone Labor Inc Privacy system
FR95619E (fr) * 1966-05-05 1971-03-26 It Telecommunicazioni Siemens Systeme de transmission de signaux téléphoniques a allocation de temps.
CH499932A (de) * 1968-02-12 1970-11-30 Patelhold Patentverwertung Synchronisierverfahren für programmgesteuerte Trägerumtastung
CH518658A (de) * 1970-07-07 1972-01-31 Patelhold Patentverwaltungs Un Verfahren zur verschlüsselten Nachrichtenübermittlung durch zeitliche Vertauschung von Informationselementen
FR2129013A5 (xx) * 1971-03-11 1972-10-27 Snecma

Also Published As

Publication number Publication date
ZA74916B (en) 1974-12-24
JPS49119502A (xx) 1974-11-15
FR2217875B1 (xx) 1978-05-12
CH574692A5 (xx) 1976-04-15
DE2318489B2 (de) 1979-05-03
DE2318489C3 (de) 1982-12-23
CA1003137A (en) 1977-01-04
NO140401C (no) 1979-08-22
NO140401B (no) 1979-05-14
GB1465393A (en) 1977-02-23
IT1019573B (it) 1977-11-30
DE2318489A1 (de) 1974-08-15
FR2217875A1 (xx) 1974-09-06
NO740416L (no) 1974-08-14
SE392556B (sv) 1977-03-28

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Legal Events

Date Code Title Description
BV The patent application has lapsed