BE446464A - - Google Patents
Info
- Publication number
- BE446464A BE446464A BE446464DA BE446464A BE 446464 A BE446464 A BE 446464A BE 446464D A BE446464D A BE 446464DA BE 446464 A BE446464 A BE 446464A
- 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
- H04Q1/442—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies
- H04Q1/4423—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies using one signalling frequency
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB954042A GB554786A (en) | 1942-07-09 | 1942-07-09 | Electrical signal transmission system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE446464A true BE446464A (xx) | 1948-04-17 |
Family
ID=9873964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE446464D BE446464A (xx) | 1942-07-09 | 1947-06-20 |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE446464A (xx) |
| CH (1) | CH233480A (xx) |
| FR (1) | FR882217A (xx) |
| GB (1) | GB554786A (xx) |
-
1942
- 1942-05-20 FR FR882217D patent/FR882217A/fr not_active Expired
- 1942-07-03 CH CH233480D patent/CH233480A/de unknown
- 1942-07-09 GB GB954042A patent/GB554786A/en not_active Expired
-
1947
- 1947-06-20 BE BE446464D patent/BE446464A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| GB554786A (en) | 1943-07-19 |
| FR882217A (fr) | 1943-05-21 |
| CH233480A (de) | 1944-07-31 |