BE333678A - - Google Patents
Info
- Publication number
- BE333678A BE333678A BE333678DA BE333678A BE 333678 A BE333678 A BE 333678A BE 333678D A BE333678D A BE 333678DA BE 333678 A BE333678 A BE 333678A
- 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)
- Electric Propulsion And Braking For Vehicles (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1420925A GB253350A (en) | 1925-05-29 | 1925-05-29 | Improvements in automatic telephone systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE333678A true BE333678A (en:Method) |
Family
ID=10037021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE333678D BE333678A (en:Method) | 1925-05-29 |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE333678A (en:Method) |
| CH (1) | CH122198A (en:Method) |
| FR (1) | FR618081A (en:Method) |
| GB (1) | GB253350A (en:Method) |
-
0
- BE BE333678D patent/BE333678A/xx unknown
-
1925
- 1925-05-29 GB GB1420925A patent/GB253350A/en not_active Expired
-
1926
- 1926-06-24 FR FR618081D patent/FR618081A/fr not_active Expired
- 1926-09-02 CH CH122198D patent/CH122198A/de unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FR618081A (fr) | 1927-03-02 |
| GB253350A (en) | 1926-06-17 |
| CH122198A (de) | 1927-10-01 |