NL34344C - - Google Patents
Info
- Publication number
- NL34344C NL34344C NL34344DA NL34344C NL 34344 C NL34344 C NL 34344C NL 34344D A NL34344D A NL 34344DA NL 34344 C NL34344 C NL 34344C
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M17/00—Prepayment of wireline communication systems, wireless communication systems or telephone systems
- H04M17/02—Coin-freed or check-freed systems, e.g. mobile- or card-operated phones, public telephones or booths
-
- 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)
- Computer Networks & Wireless Communication (AREA)
- Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE401586X | 1932-05-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL34344C true NL34344C (en) |
Family
ID=6406612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL34344D NL34344C (en) | 1932-05-17 |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE395872A (en) |
| FR (1) | FR754355A (en) |
| GB (1) | GB401586A (en) |
| NL (1) | NL34344C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3511939A (en) * | 1967-03-20 | 1970-05-12 | Tamura Electric Works Ltd | Local-call pay telephone arranged for key-enabled toll calls |
-
0
- NL NL34344D patent/NL34344C/xx active
- BE BE395872D patent/BE395872A/xx unknown
- FR FR754355D patent/FR754355A/fr not_active Expired
-
1933
- 1933-04-11 GB GB10859/33A patent/GB401586A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB401586A (en) | 1933-11-16 |
| BE395872A (en) | |
| FR754355A (en) | 1933-11-03 |