BE519944A - - Google Patents
Info
- Publication number
- BE519944A BE519944A BE519944DA BE519944A BE 519944 A BE519944 A BE 519944A BE 519944D A BE519944D A BE 519944DA BE 519944 A BE519944 A BE 519944A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB377652A GB726906A (en) | 1952-02-13 | 1952-02-13 | Improvements in or relating to tone generators for telecommunication systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE519944A true BE519944A (en:Method) |
Family
ID=9764704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE519944D BE519944A (en:Method) | 1952-02-13 |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE519944A (en:Method) |
| GB (1) | GB726906A (en:Method) |
-
0
- BE BE519944D patent/BE519944A/xx unknown
-
1952
- 1952-02-13 GB GB377652A patent/GB726906A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB726906A (en) | 1955-03-23 |