BE474451A - - Google Patents
Info
- Publication number
- BE474451A BE474451A BE474451DA BE474451A BE 474451 A BE474451 A BE 474451A BE 474451D A BE474451D A BE 474451DA BE 474451 A BE474451 A BE 474451A
- 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)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL950770X | 1945-11-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE474451A true BE474451A (en:Method) |
Family
ID=19865806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE474451D BE474451A (en:Method) | 1945-11-15 |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE474451A (en:Method) |
| FR (1) | FR950770A (en:Method) |
-
0
- BE BE474451D patent/BE474451A/xx unknown
-
1947
- 1947-08-01 FR FR950770D patent/FR950770A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR950770A (fr) | 1949-10-06 |