BE750302A - INFORMATION TRANSMISSION DEVICE USING JAMMED AUDIO-FREQUENCY SIGNALS - Google Patents

INFORMATION TRANSMISSION DEVICE USING JAMMED AUDIO-FREQUENCY SIGNALS

Info

Publication number
BE750302A
BE750302A BE750302DA BE750302A BE 750302 A BE750302 A BE 750302A BE 750302D A BE750302D A BE 750302DA BE 750302 A BE750302 A BE 750302A
Authority
BE
Belgium
Prior art keywords
jammed
audio
transmission device
information transmission
frequency signals
Prior art date
Application number
Other languages
French (fr)
Inventor
Svenska A B Philips
Original Assignee
Philips Nv
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
Priority claimed from SE06920/69A external-priority patent/SE353633B/xx
Priority claimed from SE06921/69A external-priority patent/SE354394B/xx
Application filed by Philips Nv filed Critical Philips Nv
Publication of BE750302A publication Critical patent/BE750302A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H04K1/003—Secret communication by varying carrier frequency at or within predetermined or random intervals
BE750302D 1969-05-14 1970-05-12 INFORMATION TRANSMISSION DEVICE USING JAMMED AUDIO-FREQUENCY SIGNALS BE750302A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE06920/69A SE353633B (en) 1969-05-14 1969-05-14
SE06921/69A SE354394B (en) 1969-05-14 1969-05-14

Publications (1)

Publication Number Publication Date
BE750302A true BE750302A (en) 1970-11-12

Family

ID=26654737

Family Applications (1)

Application Number Title Priority Date Filing Date
BE750302D BE750302A (en) 1969-05-14 1970-05-12 INFORMATION TRANSMISSION DEVICE USING JAMMED AUDIO-FREQUENCY SIGNALS

Country Status (10)

Country Link
US (1) US3696207A (en)
JP (1) JPS4932601B1 (en)
AT (1) AT312691B (en)
BE (1) BE750302A (en)
CA (1) CA919321A (en)
CH (1) CH519831A (en)
DE (1) DE2021941A1 (en)
FR (1) FR2047764A5 (en)
GB (1) GB1257584A (en)
NL (1) NL7006806A (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6612935A (en) * 1966-09-14 1968-03-15
US3921151A (en) * 1971-06-21 1975-11-18 Patelhold Patentwerwertungs & Apparatus for enciphering transmitted data by interchanging signal elements of the transmitted data without overlapping or omitting any elements within the transmitted signal train
US3808536A (en) * 1972-04-12 1974-04-30 Gen Electric Co Ltd Communication scrambler system
US3886313A (en) * 1972-09-29 1975-05-27 Datotek Voice security method and system
US3893031A (en) * 1972-11-08 1975-07-01 Boeing Co Synchronization system for voice privacy unit
US3909534A (en) * 1973-09-07 1975-09-30 Boeing Co Voice privacy unit for intercommunication systems
US4058677A (en) * 1974-04-26 1977-11-15 Lear Siegler, Inc. Sound scrambling equipment
CH607506A5 (en) * 1976-06-01 1978-12-29 Europ Handelsges Anst
US4074079A (en) * 1976-06-02 1978-02-14 Bell Telephone Laboratories, Incorporated Coin telephone antifraud system
US4133977A (en) * 1977-02-25 1979-01-09 Lear Siegler, Inc. Voice scrambler using syllabic masking
DE2737576C1 (en) * 1977-08-22 1986-01-09 Siemens AG, 1000 Berlin und 8000 München Military radar or radio communications system
US4228321A (en) * 1978-05-16 1980-10-14 Bell Telephone Laboratories, Incorporated Privacy transmission system with remote key control
US4268720A (en) * 1979-05-25 1981-05-19 Gte Laboratories Incorporated Scrambler speech transmission and synchronization system
US4790009A (en) * 1984-10-29 1988-12-06 Victor Company Of Japan, Ltd. Scrambler system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2401403A (en) * 1943-12-15 1946-06-04 Rca Corp Secret signaling
US3180927A (en) * 1961-09-07 1965-04-27 Itt Cryptosecure transmission system
NL6612935A (en) * 1966-09-14 1968-03-15

Also Published As

Publication number Publication date
DE2021941A1 (en) 1972-01-13
AT312691B (en) 1974-01-10
NL7006806A (en) 1970-11-17
US3696207A (en) 1972-10-03
CH519831A (en) 1972-02-29
FR2047764A5 (en) 1971-03-12
CA919321A (en) 1973-01-16
JPS4932601B1 (en) 1974-08-31
GB1257584A (en) 1971-12-22

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