NL7212139A - - Google Patents

Info

Publication number: NL7212139A
Authority: NL; Netherlands

Application number

NL7212139A

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.)

1971-09-07

Filing date

1972-09-06

Publication date

1973-03-09

1972-09-06 Application filed filed Critical

1973-03-09 Publication of NL7212139A publication Critical patent/NL7212139A/xx

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)

NL7212139A 1971-09-07 1972-09-06 NL7212139A (xx)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number	Publication Date
NL7212139A true NL7212139A (xx)	1973-03-09

Family

ID=22650774

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
NL7212139A NL7212139A (xx)	1971-09-07	1972-09-06

Country Status (7)

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

Families Citing this family (7)

* 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
US4167700A (en) *	1977-05-02	1979-09-11	Motorola, Inc.	Digital voice protection system and method
JPS5961242A (ja) *	1982-09-30	1984-04-07	Fujitsu Ltd	秘匿通信システム
CA1226914A (en) *	1984-01-26	1987-09-15	The University Of British Columbia	Modem for pseudo noise communication on a.c. lines
JPS61199341A (ja) *	1985-02-28	1986-09-03	Tamura Electric Works Ltd	コ−ドレス電話装置
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

1972
- 1972-08-21 GB GB3882472A patent/GB1399365A/en not_active Expired
- 1972-08-28 CH CH1268172A patent/CH567843A5/xx not_active IP Right Cessation
- 1972-09-01 DE DE2243113A patent/DE2243113A1/de active Pending
- 1972-09-02 IT IT52512/72A patent/IT972344B/it active
- 1972-09-06 NL NL7212139A patent/NL7212139A/xx not_active Application Discontinuation
- 1972-09-06 FR FR7231624A patent/FR2152161A5/fr not_active Expired
- 1972-09-07 JP JP47089972A patent/JPS4837003A/ja active Pending

Also Published As

Publication number	Publication date
GB1399365A (en)	1975-07-02
IT972344B (it)	1974-05-20
FR2152161A5 (xx)	1973-04-20
CH567843A5 (xx)	1975-10-15
DE2243113A1 (de)	1973-03-15
JPS4837003A (xx)	1973-05-31

Publication	Publication Date	Title
ATA136472A (xx)	1973-12-15
AR196074A1 (xx)	1973-11-30
JPS4837003A (xx)	1973-05-31
AU2691671A (xx)	1972-09-28
AU2952271A (xx)	1972-12-07
AU2941471A (xx)	1972-11-30
AU2894671A (xx)	1972-11-23
AU3005371A (xx)	1972-12-21
AU2854371A (xx)	1972-11-09
AU2907471A (xx)	1972-11-23
AU2706571A (xx)	1971-07-15
AU2837671A (xx)	1972-11-09
AR202997Q (xx)	1975-08-08
AU2875571A (xx)	1972-11-16
AU2880771A (xx)	1972-11-16
AU2885171A (xx)	1972-11-16
AU1109576A (xx)	1976-04-29
AR199640Q (xx)	1974-09-23
AU2927871A (xx)	1972-11-30
AU2930871A (xx)	1972-11-30
AU2938071A (xx)	1972-11-30
AU2940971A (xx)	1972-11-30
AU2684171A (xx)	1971-07-15
AU2399971A (xx)	1972-07-06
AU2963771A (xx)	1972-12-07

Legal Events

Date	Code	Title	Description
1979-10-25	BV	The patent application has lapsed