BE446385A - - Google Patents
Info
- Publication number
- BE446385A BE446385A BE446385DA BE446385A BE 446385 A BE446385 A BE 446385A BE 446385D A BE446385D A BE 446385DA BE 446385 A BE446385 A BE 446385A
- Authority
- BE
- Belgium
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)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH225078T | 1941-08-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE446385A true BE446385A (en:Method) |
Family
ID=4453849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE446385D BE446385A (en:Method) | 1941-08-06 |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE446385A (en:Method) |
| CH (1) | CH225078A (en:Method) |
-
0
- BE BE446385D patent/BE446385A/xx unknown
-
1941
- 1941-08-06 CH CH225078D patent/CH225078A/fr unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CH225078A (fr) | 1942-12-31 |