BE506490A - - Google Patents
Info
- Publication number
- BE506490A BE506490A BE506490DA BE506490A BE 506490 A BE506490 A BE 506490A BE 506490D A BE506490D A BE 506490DA BE 506490 A BE506490 A BE 506490A
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Devices For Supply Of Signal Current (AREA)
- Amplifiers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US206275A US2680784A (en) | 1951-01-16 | 1951-01-16 | Ringing current repeater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE506490A true BE506490A (ja�@�@) |
Family
ID=22765678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE506490D BE506490A (ja�@�@) | 1951-01-16 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2680784A (ja�@�@) |
| BE (1) | BE506490A (ja�@�@) |
| GB (1) | GB719139A (ja�@�@) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL287044A (ja�@�@) * | 1961-12-21 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1699774A (en) * | 1926-12-09 | 1929-01-22 | Reserve Holding Co | Ringing-current repeater |
| US1953487A (en) * | 1931-11-17 | 1934-04-03 | Bell Telephone Labor Inc | Transmission control circuits |
| US2004759A (en) * | 1934-07-12 | 1935-06-11 | Alfred T Jester | Ringing repeater |
| NL46063C (ja�@�@) * | 1934-12-29 | |||
| FR959681A (ja�@�@) * | 1941-03-29 | 1950-03-31 | ||
| US2452239A (en) * | 1946-04-15 | 1948-10-26 | Lorain Prod Corp | Telephone circuit |
-
0
- BE BE506490D patent/BE506490A/xx unknown
-
1951
- 1951-01-16 US US206275A patent/US2680784A/en not_active Expired - Lifetime
- 1951-10-03 GB GB23066/51A patent/GB719139A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2680784A (en) | 1954-06-08 |
| GB719139A (en) | 1954-11-24 |