NL36070C - - Google Patents
Info
- Publication number
- NL36070C NL36070C NL36070DA NL36070C NL 36070 C NL36070 C NL 36070C NL 36070D A NL36070D A NL 36070DA NL 36070 C NL36070 C NL 36070C
- 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)
- Switch Cases, Indication, And Locking (AREA)
- Transmitters (AREA)
- Transmission Devices (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE383166X | 1931-04-13 | ||
| DEF72077D DE641077C (en) | 1931-04-13 | 1931-10-23 | Number switch for self-connection systems with mechanical prevention of current impulses after choosing certain digits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL36070C true NL36070C (en) |
Family
ID=25872302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL36070D NL36070C (en) | 1931-04-13 |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE641077C (en) |
| GB (2) | GB383166A (en) |
| NL (1) | NL36070C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1005761B (en) * | 1951-12-12 | 1957-04-04 | Askania Werke Ag | Device for the continuous determination of the moisture content of materials running through an air-drying system, in particular material webs |
| US3284578A (en) * | 1963-02-11 | 1966-11-08 | Earl R Evans | Direct-dialing long-distance telephone systems |
| DE1901692A1 (en) * | 1969-01-15 | 1970-08-13 | Standard Elek K Lorenz Ag | Arrangement for controlling the establishment of a connection in telecommunication systems, in particular telephone systems, from a coin operated telephone set |
-
0
- NL NL36070D patent/NL36070C/xx active
-
1931
- 1931-10-23 DE DEF72077D patent/DE641077C/en not_active Expired
-
1932
- 1932-04-06 GB GB9884/32A patent/GB383166A/en not_active Expired
- 1932-04-15 GB GB10836/32A patent/GB389661A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB383166A (en) | 1932-11-10 |
| DE641077C (en) | 1937-01-19 |
| GB389661A (en) | 1933-03-23 |