NL7308862A - - Google Patents
Info
- Publication number
- NL7308862A NL7308862A NL7308862A NL7308862A NL7308862A NL 7308862 A NL7308862 A NL 7308862A NL 7308862 A NL7308862 A NL 7308862A NL 7308862 A NL7308862 A NL 7308862A NL 7308862 A NL7308862 A NL 7308862A
- 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
- H04M1/663—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)
- Telephonic Communication Services (AREA)
- Prepayment Telephone Systems (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US26649072A | 1972-06-26 | 1972-06-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL7308862A true NL7308862A (https=) | 1973-12-28 |
Family
ID=23014788
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL7308862A NL7308862A (https=) | 1972-06-26 | 1973-06-26 |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS4952506A (https=) |
| BE (1) | BE801478A (https=) |
| CA (1) | CA984983A (https=) |
| DE (1) | DE2332244C2 (https=) |
| GB (1) | GB1432983A (https=) |
| IT (1) | IT986215B (https=) |
| NL (1) | NL7308862A (https=) |
| SE (1) | SE382293B (https=) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5399802A (en) * | 1977-02-14 | 1978-08-31 | Nippon Telegr & Teleph Corp <Ntt> | Specific subscriber calling equipment of automatic answering telephone set |
| JPS53132911A (en) * | 1977-04-26 | 1978-11-20 | Iwatsu Electric Co Ltd | Telephone set |
| JPS53146511A (en) * | 1977-05-26 | 1978-12-20 | Toyo Communication Equip | Caller identifying telephone set |
| JPS5648160U (https=) * | 1980-09-04 | 1981-04-28 | ||
| DE3405014A1 (de) * | 1984-02-13 | 1985-08-14 | Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt | Verfahren fuer den betrieb eines telefon-anrufbeantworters |
| GB2183125B (en) * | 1985-10-10 | 1989-11-29 | Microcompass Ltd | Improvements to communication apparatus |
| DE19511622A1 (de) | 1995-03-30 | 1996-10-02 | Michael Wolf | Türrufbeantworter |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1283074A (fr) * | 1961-03-08 | 1962-01-27 | Installation téléphonique d'abonné | |
| DE1437906B2 (de) * | 1965-04-17 | 1970-03-26 | Blessing, Dipl.-Kfm. Dr. Gerhard, 7336 Uhingen | Schaltungsanordnung für eine Zusatzeinrichtung an Fernsprechteilnehmerstellen |
| JPS4831810A (https=) * | 1971-08-30 | 1973-04-26 |
-
1973
- 1973-06-11 CA CA173,733A patent/CA984983A/en not_active Expired
- 1973-06-21 GB GB2952673A patent/GB1432983A/en not_active Expired
- 1973-06-25 DE DE19732332244 patent/DE2332244C2/de not_active Expired
- 1973-06-25 SE SE7308899A patent/SE382293B/xx unknown
- 1973-06-25 JP JP7160573A patent/JPS4952506A/ja active Pending
- 1973-06-25 IT IT5102273A patent/IT986215B/it active
- 1973-06-26 BE BE132756A patent/BE801478A/xx not_active IP Right Cessation
- 1973-06-26 NL NL7308862A patent/NL7308862A/xx not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| IT986215B (it) | 1975-01-20 |
| JPS4952506A (https=) | 1974-05-22 |
| CA984983A (en) | 1976-03-02 |
| SE382293B (sv) | 1976-01-19 |
| GB1432983A (en) | 1976-04-22 |
| DE2332244C2 (de) | 1984-04-05 |
| BE801478A (fr) | 1973-10-15 |
| DE2332244A1 (de) | 1974-01-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| BA | A request for search or an international-type search has been filed | ||
| BB | A search report has been drawn up | ||
| BC | A request for examination has been filed | ||
| A85 | Still pending on 85-01-01 | ||
| BV | The patent application has lapsed |