BE430779A - - Google Patents
Info
- Publication number
- BE430779A BE430779A BE430779DA BE430779A BE 430779 A BE430779 A BE 430779A BE 430779D A BE430779D A BE 430779DA BE 430779 A BE430779 A BE 430779A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/001—Two-way communication systems between a limited number of parties
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR837339T | 1937-10-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE430779A true BE430779A (en:Method) | 1938-11-30 |
Family
ID=6545929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE430779D BE430779A (en:Method) | 1937-10-26 | 1938-10-22 |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE430779A (en:Method) |
| FR (1) | FR837339A (en:Method) |
| GB (1) | GB502595A (en:Method) |
-
1937
- 1937-10-26 FR FR837339D patent/FR837339A/fr not_active Expired
-
1938
- 1938-08-10 GB GB2364738A patent/GB502595A/en not_active Expired
- 1938-10-22 BE BE430779D patent/BE430779A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FR837339A (fr) | 1939-02-08 |
| GB502595A (en) | 1939-03-21 |