NL34119C - - Google Patents
Info
- Publication number
- NL34119C NL34119C NL34119DA NL34119C NL 34119 C NL34119 C NL 34119C NL 34119D A NL34119D A NL 34119DA NL 34119 C NL34119 C NL 34119C
- 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
-
- 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
- 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
- H04M17/026—Constructional features
Landscapes
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Telephone Set Structure (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE396626X | 1932-03-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL34119C true NL34119C (pt) |
Family
ID=6397071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL34119D NL34119C (pt) | 1932-03-04 |
Country Status (2)
| Country | Link |
|---|---|
| GB (1) | GB396626A (pt) |
| NL (1) | NL34119C (pt) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2774823A (en) * | 1951-12-21 | 1956-12-18 | Maynez Pedro Salinas | Selective electrical dialing system |
-
0
- NL NL34119D patent/NL34119C/xx active
-
1933
- 1933-01-17 GB GB1557/33A patent/GB396626A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2774823A (en) * | 1951-12-21 | 1956-12-18 | Maynez Pedro Salinas | Selective electrical dialing system |
Also Published As
| Publication number | Publication date |
|---|---|
| GB396626A (en) | 1933-08-10 |