CH537677A - Dispositivo di blocco alla teleselezione e ai servizi tassati in generale per apparecchi telefonici d'utente - Google Patents
Dispositivo di blocco alla teleselezione e ai servizi tassati in generale per apparecchi telefonici d'utenteInfo
- Publication number
- CH537677A CH537677A CH410771A CH410771A CH537677A CH 537677 A CH537677 A CH 537677A CH 410771 A CH410771 A CH 410771A CH 410771 A CH410771 A CH 410771A CH 537677 A CH537677 A CH 537677A
- Authority
- CH
- Switzerland
- Prior art keywords
- taxed
- services
- general
- blocking device
- telephone sets
- Prior art date
Links
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
- H04M1/677—Preventing the dialling or sending of predetermined telephone numbers or selected types of telephone numbers, e.g. long distance numbers
Landscapes
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Signal Processing (AREA)
- Telephonic Communication Services (AREA)
- Devices For Supply Of Signal Current (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT3063770 | 1970-10-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH537677A true CH537677A (it) | 1973-05-31 |
Family
ID=11230431
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH410771A CH537677A (it) | 1970-10-06 | 1971-03-19 | Dispositivo di blocco alla teleselezione e ai servizi tassati in generale per apparecchi telefonici d'utente |
Country Status (7)
Country | Link |
---|---|
US (1) | US3749847A (it) |
AT (1) | AT325111B (it) |
CH (1) | CH537677A (it) |
DE (1) | DE2146120A1 (it) |
FR (1) | FR2083287A5 (it) |
GB (1) | GB1360038A (it) |
NL (1) | NL7113553A (it) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES403458A1 (es) * | 1971-12-17 | 1975-05-01 | Sits Soc It Telecom Siemens | Circuito de bloqueo a la teleseleccion y a los servicios tasados en general para aparatos telefonicos de usuario. |
US3872260A (en) * | 1972-08-10 | 1975-03-18 | Telephonic Equipment Corp | Toll call prohibitor |
FR2291656A1 (fr) * | 1974-11-14 | 1976-06-11 | Telic | Clavier d'appel |
US4124781A (en) * | 1977-08-31 | 1978-11-07 | Akzona Incorporated | Telephone toll restrictor |
DE3227763A1 (de) * | 1982-07-24 | 1984-02-02 | Krone Gmbh, 1000 Berlin | Einrichtung zur wahlweisen freigabe oder sperrung einer fernwahl-rufnummer |
GB8701723D0 (en) * | 1987-01-27 | 1987-03-04 | Rainer M G | Call barring apparatus |
US7068776B1 (en) * | 2000-04-19 | 2006-06-27 | Gamble Oliver W | Method and system for routing calls to desire discount telephone services |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1649494A (en) * | 1921-07-06 | 1927-11-15 | Automatic Electric Inc | Automatic telephone system |
US3569634A (en) * | 1967-06-27 | 1971-03-09 | Claudio Amadasi | Blocking circuit for telephone apparatus |
US3553382A (en) * | 1967-08-04 | 1971-01-05 | Edward R Edelberg | Toll call signalling and diverting system |
-
1971
- 1971-03-19 CH CH410771A patent/CH537677A/it not_active IP Right Cessation
- 1971-03-31 FR FR7111334A patent/FR2083287A5/fr not_active Expired
- 1971-08-02 AT AT673371A patent/AT325111B/de not_active IP Right Cessation
- 1971-09-15 DE DE19712146120 patent/DE2146120A1/de active Pending
- 1971-09-17 GB GB4348771A patent/GB1360038A/en not_active Expired
- 1971-10-01 NL NL7113553A patent/NL7113553A/xx unknown
- 1971-10-05 US US00186692A patent/US3749847A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
FR2083287A5 (it) | 1971-12-10 |
NL7113553A (it) | 1972-04-10 |
DE2146120A1 (de) | 1972-04-13 |
AT325111B (de) | 1975-10-10 |
GB1360038A (en) | 1974-07-17 |
US3749847A (en) | 1973-07-31 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PL | Patent ceased |