BE445238A - - Google Patents
Info
- Publication number
- BE445238A BE445238A BE445238DA BE445238A BE 445238 A BE445238 A BE 445238A BE 445238D A BE445238D A BE 445238DA BE 445238 A BE445238 A BE 445238A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/68—Circuit arrangements for preventing eavesdropping
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL241116X | 1941-04-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE445238A true BE445238A (en:Method) |
Family
ID=19780549
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE445238D BE445238A (en:Method) | 1941-04-16 |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE445238A (en:Method) |
| CH (1) | CH241116A (en:Method) |
| FR (1) | FR881282A (en:Method) |
-
0
- BE BE445238D patent/BE445238A/xx unknown
-
1942
- 1942-04-15 FR FR881282D patent/FR881282A/fr not_active Expired
- 1942-04-16 CH CH241116D patent/CH241116A/de unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FR881282A (fr) | 1943-04-20 |
| CH241116A (de) | 1946-02-15 |