JPS4837003A - - Google Patents

Info

Publication number
JPS4837003A
JPS4837003A JP47089972A JP8997272A JPS4837003A JP S4837003 A JPS4837003 A JP S4837003A JP 47089972 A JP47089972 A JP 47089972A JP 8997272 A JP8997272 A JP 8997272A JP S4837003 A JPS4837003 A JP S4837003A
Authority
JP
Japan
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.)
Pending
Application number
JP47089972A
Other languages
Japanese (ja)
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 JPS4837003A publication Critical patent/JPS4837003A/ja
Pending legal-status Critical Current

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radio Relay Systems (AREA)
  • Mobile Radio Communication Systems (AREA)
JP47089972A 1971-09-07 1972-09-07 Pending JPS4837003A (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US17800071A 1971-09-07 1971-09-07

Publications (1)

Publication Number Publication Date
JPS4837003A true JPS4837003A (enrdf_load_stackoverflow) 1973-05-31

Family

ID=22650774

Family Applications (1)

Application Number Title Priority Date Filing Date
JP47089972A Pending JPS4837003A (enrdf_load_stackoverflow) 1971-09-07 1972-09-07

Country Status (7)

Country Link
JP (1) JPS4837003A (enrdf_load_stackoverflow)
CH (1) CH567843A5 (enrdf_load_stackoverflow)
DE (1) DE2243113A1 (enrdf_load_stackoverflow)
FR (1) FR2152161A5 (enrdf_load_stackoverflow)
GB (1) GB1399365A (enrdf_load_stackoverflow)
IT (1) IT972344B (enrdf_load_stackoverflow)
NL (1) NL7212139A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53136404A (en) * 1977-05-02 1978-11-29 Motorola Inc Digital audio protecting system and method
JPS5961242A (ja) * 1982-09-30 1984-04-07 Fujitsu Ltd 秘匿通信システム
JPS61199341A (ja) * 1985-02-28 1986-09-03 Tamura Electric Works Ltd コ−ドレス電話装置

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2416597A1 (fr) * 1971-12-09 1979-08-31 Berger Claude Procede de codage d'un signal
CA1226914A (en) * 1984-01-26 1987-09-15 The University Of British Columbia Modem for pseudo noise communication on a.c. lines
CN105071886B (zh) * 2015-08-24 2017-12-19 苏州华启智能科技有限公司 一种车载广播系统音频总线复用系统
US20200361374A1 (en) * 2017-08-18 2020-11-19 John Hegarty A device for operating a sounder to produce a plurality of different sounds, and a method for operating a sounder to produce a plurality of different sounds

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53136404A (en) * 1977-05-02 1978-11-29 Motorola Inc Digital audio protecting system and method
JPS5961242A (ja) * 1982-09-30 1984-04-07 Fujitsu Ltd 秘匿通信システム
JPS61199341A (ja) * 1985-02-28 1986-09-03 Tamura Electric Works Ltd コ−ドレス電話装置

Also Published As

Publication number Publication date
CH567843A5 (enrdf_load_stackoverflow) 1975-10-15
GB1399365A (en) 1975-07-02
FR2152161A5 (enrdf_load_stackoverflow) 1973-04-20
IT972344B (it) 1974-05-20
DE2243113A1 (de) 1973-03-15
NL7212139A (enrdf_load_stackoverflow) 1973-03-09

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