FR887180A - Electrical communications systems - Google Patents
Electrical communications systemsInfo
- Publication number
- FR887180A FR887180A FR887180DA FR887180A FR 887180 A FR887180 A FR 887180A FR 887180D A FR887180D A FR 887180DA FR 887180 A FR887180 A FR 887180A
- Authority
- FR
- France
- Prior art keywords
- communications systems
- electrical communications
- electrical
- systems
- communications
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/36—Repeater circuits
- H04B3/38—Repeater circuits for signals in two different frequency ranges transmitted in opposite directions over the same transmission path
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB952041A GB548473A (en) | 1941-07-26 | 1941-07-26 | Improvements in 4-wire terminating arrangements in electrical communication systems |
Publications (1)
Publication Number | Publication Date |
---|---|
FR887180A true FR887180A (en) | 1943-11-05 |
Family
ID=9873551
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR887180D Expired FR887180A (en) | 1941-07-26 | 1941-12-11 | Electrical communications systems |
Country Status (3)
Country | Link |
---|---|
BE (1) | BE439378A (en) |
FR (1) | FR887180A (en) |
GB (1) | GB548473A (en) |
-
1940
- 1940-09-26 BE BE439378D patent/BE439378A/xx unknown
-
1941
- 1941-07-26 GB GB952041A patent/GB548473A/en not_active Expired
- 1941-12-11 FR FR887180D patent/FR887180A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB548473A (en) | 1942-10-12 |
BE439378A (en) | 1940-10-31 |
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