NL44301C - - Google Patents
Info
- Publication number
- NL44301C NL44301C NL44301DA NL44301C NL 44301 C NL44301 C NL 44301C NL 44301D A NL44301D A NL 44301DA NL 44301 C NL44301 C NL 44301C
- 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
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07F—COIN-FREED OR LIKE APPARATUS
- G07F5/00—Coin-actuated mechanisms; Interlocks
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Prepayment Telephone Systems (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH485117X | 1935-11-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL44301C true NL44301C (en) |
Family
ID=4516424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL44301D NL44301C (en) | 1935-11-16 |
Country Status (5)
| Country | Link |
|---|---|
| CH (1) | CH186683A (en) |
| DE (1) | DE665859C (en) |
| FR (1) | FR813539A (en) |
| GB (1) | GB485117A (en) |
| NL (1) | NL44301C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE857216C (en) * | 1942-12-07 | 1952-11-27 | Siemens Ag | Circuit arrangement in telephone systems with coin cashiers for network group traffic |
-
0
- NL NL44301D patent/NL44301C/xx active
-
1935
- 1935-11-16 CH CH186683D patent/CH186683A/en unknown
-
1936
- 1936-11-14 DE DEE48995D patent/DE665859C/en not_active Expired
- 1936-11-14 FR FR813539D patent/FR813539A/en not_active Expired
- 1936-11-16 GB GB31297/36A patent/GB485117A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CH186683A (en) | 1936-09-30 |
| GB485117A (en) | 1938-05-16 |
| FR813539A (en) | 1937-06-03 |
| DE665859C (en) | 1938-10-07 |