BE521897A - - Google Patents
Info
- Publication number
- BE521897A BE521897A BE521897DA BE521897A BE 521897 A BE521897 A BE 521897A BE 521897D A BE521897D A BE 521897DA BE 521897 A BE521897 A BE 521897A
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEM15000A DE967406C (de) | 1952-08-03 | 1952-08-03 | Schaltungsanordnung zur Signalgabe mittels Wechselstrom beliebiger Frequenz |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE521897A true BE521897A (it) |
Family
ID=7296746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE521897D BE521897A (it) | 1952-08-03 |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE521897A (it) |
| CH (1) | CH315754A (it) |
| DE (1) | DE967406C (it) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE563171A (it) * | 1956-12-14 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR954872A (it) * | 1950-01-06 | |||
| GB397930A (en) * | 1932-03-04 | 1933-09-04 | Marconi Internat Marine Comm C | Improvements in or relating to radio and other high frequency transmitters |
| DE684504C (de) * | 1933-12-15 | 1939-11-29 | Siemens & Halske Akt Ges | Schaltungsanordnung zur UEbertragung von Stromstoessen in Fernsprechanlagen mit Waehlerbetrieb |
| DE676645C (de) * | 1935-06-16 | 1939-06-08 | Siemens & Halske Akt Ges | Schaltungsanordnung zur Signalgabe in Fernsprechanlagen |
| BE466622A (it) * | 1943-01-14 | |||
| GB566602A (en) * | 1943-07-01 | 1945-01-05 | Automatic Telephone & Elect | Improvements in telephone or like systems |
| DE815357C (de) * | 1948-10-01 | 1951-10-01 | Siemens & Halske A G | Schaltungsanordnung fuer Fernsprechanlagen mit Waehlerbetrieb zur Signalgabe mit Wechselstrom im Sprachfrequenzbereich |
-
0
- BE BE521897D patent/BE521897A/xx unknown
-
1952
- 1952-08-03 DE DEM15000A patent/DE967406C/de not_active Expired
-
1953
- 1953-07-27 CH CH315754D patent/CH315754A/de unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE967406C (de) | 1957-11-07 |
| CH315754A (de) | 1956-08-31 |