BE378432A - - Google Patents
Info
- Publication number
- BE378432A BE378432A BE378432DA BE378432A BE 378432 A BE378432 A BE 378432A BE 378432D A BE378432D A BE 378432DA BE 378432 A BE378432 A BE 378432A
- 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
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH374973X | 1930-03-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE378432A true BE378432A (en) |
Family
ID=4513540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE378432D BE378432A (en) | 1930-03-22 |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE378432A (en) |
| GB (1) | GB374973A (en) |
-
0
- BE BE378432D patent/BE378432A/xx unknown
-
1931
- 1931-03-23 GB GB8845/31A patent/GB374973A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB374973A (en) | 1932-06-23 |