BE437349A - - Google Patents
Info
- Publication number
- BE437349A BE437349A BE437349DA BE437349A BE 437349 A BE437349 A BE 437349A BE 437349D A BE437349D A BE 437349DA BE 437349 A BE437349 A BE 437349A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
- H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
- H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
- H04Q1/4465—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency the same frequency being used for all signalling information, e.g. A.C. nr.9 system
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE212745X | 1939-01-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE437349A true BE437349A (pt) |
Family
ID=5809651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE437349D BE437349A (pt) | 1939-01-25 |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE437349A (pt) |
| CH (1) | CH212745A (pt) |
| FR (1) | FR868478A (pt) |
-
0
- BE BE437349D patent/BE437349A/xx unknown
-
1939
- 1939-12-06 CH CH212745D patent/CH212745A/de unknown
-
1940
- 1940-12-28 FR FR868478D patent/FR868478A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR868478A (fr) | 1941-12-31 |
| CH212745A (de) | 1940-12-15 |