NL6806814A - - Google Patents
Info
- Publication number
- NL6806814A NL6806814A NL6806814A NL6806814A NL6806814A NL 6806814 A NL6806814 A NL 6806814A NL 6806814 A NL6806814 A NL 6806814A NL 6806814 A NL6806814 A NL 6806814A NL 6806814 A NL6806814 A NL 6806814A
- 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)
- Telephone Set Structure (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1967S0110093 DE1293864B (de) | 1967-05-31 | 1967-05-31 | Waehltastatur mit Fernwahlsperre |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NL6806814A true NL6806814A (en:Method) | 1968-12-02 |
| NL146354B NL146354B (nl) | 1975-06-16 |
Family
ID=7529973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL6806814A NL146354B (nl) | 1967-05-31 | 1968-05-14 | Druktoets-kiesinrichting voor een telefoonstelsel. |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE715970A (en:Method) |
| DE (1) | DE1293864B (en:Method) |
| GB (1) | GB1182569A (en:Method) |
| NL (1) | NL146354B (en:Method) |
| SE (1) | SE328028B (en:Method) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2285765A1 (fr) * | 1974-09-17 | 1976-04-16 | Picart Lebas Telephones | Dispositif de restriction de service pour appareil telephonique a clavier ou a cadran |
| DE2648679C2 (de) * | 1976-10-27 | 1978-11-16 | Elmeg-Elektro-Mechanik Gmbh, 3150 Peine | Wahltastatur mit Erstziffernsperrung |
| DE2755699C2 (de) * | 1977-12-14 | 1984-09-27 | Friedrich Merk-Telefonbau GmbH, 8000 München | Mit einem Gebührenzähler kombiniertes Sperrschloß für Fernmelde-, insbesondere Fernsprechgeräte |
| US4358640A (en) | 1980-11-25 | 1982-11-09 | Murray Leonard Q | Telephone security device |
-
1967
- 1967-05-31 DE DE1967S0110093 patent/DE1293864B/de not_active Withdrawn
-
1968
- 1968-05-14 NL NL6806814A patent/NL146354B/xx unknown
- 1968-05-30 GB GB2590668A patent/GB1182569A/en not_active Expired
- 1968-05-31 BE BE715970A patent/BE715970A/xx unknown
- 1968-05-31 SE SE07407/68A patent/SE328028B/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE1293864B (de) | 1969-04-30 |
| SE328028B (en:Method) | 1970-09-07 |
| GB1182569A (en) | 1970-02-25 |
| BE715970A (en:Method) | 1968-12-02 |
| NL146354B (nl) | 1975-06-16 |