BE713639A - - Google Patents

Info

Publication number: BE713639A
Authority: BE; Belgium

Application number

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.)

1967-04-12

Filing date

1968-04-12

Publication date

1968-08-16

1968-04-12 Application filed filed Critical

1968-08-16 Publication of BE713639A publication Critical patent/BE713639A/xx

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/66—Substation equipment, e.g. for use by subscribers with means for preventing unauthorised or fraudulent calling
- H04M1/663—Preventing unauthorised calls to a telephone set
- H04M1/665—Preventing unauthorised calls to a telephone set by checking the validity of a code

Landscapes

Engineering & Computer Science (AREA)
Computer Security & Cryptography (AREA)
Signal Processing (AREA)
Monitoring And Testing Of Exchanges (AREA)
Meter Arrangements (AREA)
Telephone Set Structure (AREA)
Telephonic Communication Services (AREA)

BE713639D 1967-04-12 1968-04-12 BE713639A (xx)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US630269A US3514548A (en)	1967-04-12	1967-04-12	Telephone apparatus for discriminating between desired and undesired calls

Publications (1)

Publication Number	Publication Date
BE713639A true BE713639A (xx)	1968-08-16

Family

ID=24526488

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
BE713639D BE713639A (xx)	1967-04-12	1968-04-12

Country Status (7)

Country	Link
US (1)	US3514548A (xx)
JP (1)	JPS4521324B1 (xx)
BE (1)	BE713639A (xx)
CH (1)	CH482370A (xx)
DE (1)	DE1762095A1 (xx)
ES (1)	ES352636A1 (xx)
FR (1)	FR1561640A (xx)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
BE791760A (fr) *	1971-11-22	1973-03-16	Kilby Jack St Clair	Systeme de repondeur telephonique
US3793487A (en) *	1971-11-22	1974-02-19	J Kilby	System for screening telephone calls
US3873781A (en) *	1973-02-16	1975-03-25	Electronic Arrays	Prevention of unauthorized use of telephone
US3936617A (en) *	1974-08-12	1976-02-03	International Mobile Machines Corporation	Code-controlled ringer attachment for telephones
US4074078A (en) *	1975-03-17	1978-02-14	The Raymond Lee Organization, Inc.	Telephone privacy device
CH619332A5 (en) *	1976-02-02	1980-09-15	Intertel Ii Inc	Signal-controlled system for optional blocking or unblocking of a transmission line, and use of the system
DE2952814A1 (de) *	1978-05-30	1981-01-08	P De Toledo	Monitoring device for monitoring telephone calls coming through a subscriber station
US4429188A (en)	1981-06-15	1984-01-31	Allen Thomas E	Telephone call screener
FR2556156B1 (fr) *	1983-12-02	1987-06-19	Epaud Claude	Procede et dispositif de selection d'appels recus par telephone
FR2574607A2 (fr) *	1983-12-15	1986-06-13	Regnier Marc Andre	Dispositif electronique anti-cambriolage simulant une presence telephonique en l'absence de l'abonne
GB2203614A (en) *	1987-04-09	1988-10-19	British Broadcasting Corp	Control of access to a telephone
GB2214384A (en) *	1988-01-04	1989-08-31	Lam Sek Wai	A control system for use with a telephone system
WO1990001236A1 (en) *	1988-07-25	1990-02-08	John James Anderson	Personal signalling telephone
US5157712A (en) *	1990-03-13	1992-10-20	Wallen Jr James	Telephone nuisance call mitigation screening device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US1975207A (en) *	1932-02-26	1934-10-02	American Telephone & Telegraph	Telephone system
US2753403A (en) *	1954-11-30	1956-07-03	Joseph P Caracciolo	Selective signal system
US3376390A (en) *	1958-12-30	1968-04-02	Hashimoto Kazuo	Telephone answering device
US3226489A (en) *	1962-10-24	1965-12-28	Russel J Grambsch	Communications control system

1967
- 1967-04-12 US US630269A patent/US3514548A/en not_active Expired - Lifetime
1968
- 1968-04-05 DE DE19681762095 patent/DE1762095A1/de active Pending
- 1968-04-10 CH CH536368A patent/CH482370A/de not_active IP Right Cessation
- 1968-04-10 ES ES352636A patent/ES352636A1/es not_active Expired
- 1968-04-10 FR FR1561640D patent/FR1561640A/fr not_active Expired
- 1968-04-12 JP JP2414068A patent/JPS4521324B1/ja active Pending
- 1968-04-12 BE BE713639D patent/BE713639A/xx unknown

Also Published As

Publication number	Publication date
JPS4521324B1 (xx)	1970-07-20
US3514548A (en)	1970-05-26
ES352636A1 (es)	1969-08-01
DE1762095A1 (de)	1970-04-16
FR1561640A (xx)	1969-03-28
CH482370A (de)	1969-11-30

Publication	Publication Date	Title
AU425114B2 (xx)	1972-06-14
AT298283B (xx)	1972-03-15
FR1561640A (xx)	1969-03-28
AU416737B2 (xx)	1971-09-03
AU342066A (xx)	1968-09-19
AU2277767A (xx)	1968-12-12
AU1273466A (xx)	1969-04-24
AU610966A (xx)	1968-11-28
AU2116667A (xx)	1969-04-03
AU2256867A (xx)	1968-12-05
AU2977667A (xx)	1969-05-22
AU3189468A (xx)	1969-07-10
AU2454867A (xx)	1969-01-16
AU3151267A (xx)	1968-01-08
AU2528767A (xx)	1970-01-08
AU408412B2 (xx)	1970-11-23
BE704024A (xx)	1968-02-01
AU25066A (xx)	1968-07-11
AU2406369A (xx)	1969-01-09
AU23366A (xx)	1968-07-11
AU34866A (xx)	1968-07-04
AU1868267A (xx)	1968-09-12
BE711554A (xx)	1968-07-15
AU1763766A (xx)	1968-08-15
BE710859A (xx)	1968-08-16