NL7113553A - - Google Patents
Info
- Publication number
- NL7113553A NL7113553A NL7113553A NL7113553A NL7113553A NL 7113553 A NL7113553 A NL 7113553A NL 7113553 A NL7113553 A NL 7113553A NL 7113553 A NL7113553 A NL 7113553A NL 7113553 A NL7113553 A NL 7113553A
- Authority
- NL
- Netherlands
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 |
|---|---|
| NL7113553A true NL7113553A (de) | 1972-04-10 |
Family
ID=11230431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL7113553A NL7113553A (de) | 1970-10-06 | 1971-10-01 |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3749847A (de) |
| AT (1) | AT325111B (de) |
| CH (1) | CH537677A (de) |
| DE (1) | DE2146120A1 (de) |
| FR (1) | FR2083287A5 (de) |
| GB (1) | GB1360038A (de) |
| NL (1) | NL7113553A (de) |
Families Citing this family (8)
| 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 |
| US4358640A (en) | 1980-11-25 | 1982-11-09 | Murray Leonard Q | Telephone security device |
| 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 |
|---|---|
| AT325111B (de) | 1975-10-10 |
| CH537677A (it) | 1973-05-31 |
| DE2146120A1 (de) | 1972-04-13 |
| US3749847A (en) | 1973-07-31 |
| FR2083287A5 (de) | 1971-12-10 |
| GB1360038A (en) | 1974-07-17 |