BE424749A - - Google Patents
Info
- Publication number
- BE424749A BE424749A BE424749DA BE424749A BE 424749 A BE424749 A BE 424749A BE 424749D A BE424749D A BE 424749DA BE 424749 A BE424749 A BE 424749A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
- Telephone Set Structure (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT512043X | 1936-11-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE424749A true BE424749A (https=) |
Family
ID=3675609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE424749D BE424749A (https=) | 1936-11-24 |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE424749A (https=) |
| FR (1) | FR829468A (https=) |
| GB (1) | GB512043A (https=) |
-
0
- BE BE424749D patent/BE424749A/xx unknown
-
1937
- 1937-11-16 GB GB31501/37A patent/GB512043A/en not_active Expired
- 1937-11-19 FR FR829468D patent/FR829468A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB512043A (en) | 1939-08-28 |
| FR829468A (fr) | 1938-06-28 |