BE455019A - - Google Patents
Info
- Publication number
- BE455019A BE455019A BE455019DA BE455019A BE 455019 A BE455019 A BE 455019A BE 455019D A BE455019D A BE 455019DA BE 455019 A BE455019 A BE 455019A
- 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 |
|---|---|---|---|
| DE902851X | 1943-04-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE455019A true BE455019A (da) |
Family
ID=6861241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE455019D BE455019A (da) | 1943-04-16 |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE455019A (da) |
| FR (1) | FR902851A (da) |
-
0
- BE BE455019D patent/BE455019A/xx unknown
-
1944
- 1944-03-21 FR FR902851D patent/FR902851A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR902851A (fr) | 1945-09-14 |