BE484067A - - Google Patents
Info
- Publication number
- BE484067A BE484067A BE484067DA BE484067A BE 484067 A BE484067 A BE 484067A BE 484067D A BE484067D A BE 484067DA BE 484067 A BE484067 A BE 484067A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/42—Circuits for by-passing of ringing signals
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Devices For Supply Of Signal Current (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR837125X | 1947-10-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE484067A true BE484067A (fr) |
Family
ID=9298447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE484067D BE484067A (fr) | 1947-10-28 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US2598159A (fr) |
| BE (1) | BE484067A (fr) |
| CH (1) | CH283259A (fr) |
| DE (1) | DE837125C (fr) |
| FR (1) | FR1006007A (fr) |
| GB (1) | GB668370A (fr) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1811963A (en) * | 1928-06-20 | 1931-06-30 | Bell Telephone Labor Inc | Apparatus for reducing crosstalk currents |
| NL36256C (fr) * | 1929-05-06 | |||
| US1811947A (en) * | 1929-05-14 | 1931-06-30 | Bell Telephone Labor Inc | Noise suppressing circuit |
| US1866592A (en) * | 1930-06-07 | 1932-07-12 | Bell Telephone Labor Inc | Voice operated repeater circuit |
| US2018464A (en) * | 1930-06-07 | 1935-10-22 | Bell Telephone Labor Inc | Voice operated transmission circuit |
| DE643015C (de) * | 1933-06-09 | 1937-03-31 | Siemens & Halske Akt Ges | Schaltungsanordnung zur UEbertragung von Stromstoessen mit Hilfe von im Sprachbereich liegenden Frequenzen ueber Verbindungsleitungen in Fernsprechanlagen mit Waehlerbetrieb |
| US2019577A (en) * | 1934-10-02 | 1935-11-05 | American Telephone & Telegraph | System of variable amplification |
| US2422309A (en) * | 1945-03-10 | 1947-06-17 | Automatic Elect Lab | Distortion correcting impulse repeater |
-
0
- BE BE484067D patent/BE484067A/xx unknown
-
1947
- 1947-10-28 FR FR1006007D patent/FR1006007A/fr not_active Expired
-
1948
- 1948-06-29 CH CH283259D patent/CH283259A/fr unknown
- 1948-07-22 GB GB19641/48A patent/GB668370A/en not_active Expired
- 1948-10-22 US US55993A patent/US2598159A/en not_active Expired - Lifetime
-
1950
- 1950-10-03 DE DEC3131A patent/DE837125C/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CH283259A (fr) | 1952-05-31 |
| DE837125C (de) | 1952-04-21 |
| US2598159A (en) | 1952-05-27 |
| GB668370A (en) | 1952-03-19 |
| FR1006007A (fr) | 1952-04-18 |