FR781474A - - Google Patents
Info
- Publication number
- FR781474A FR781474A FR781474DA FR781474A FR 781474 A FR781474 A FR 781474A FR 781474D A FR781474D A FR 781474DA FR 781474 A FR781474 A FR 781474A
- Authority
- FR
- France
- 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
- H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2379434A GB439752A (en) | 1934-08-17 | 1934-08-17 | Improvements in telephone repeaters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR781474A true FR781474A (xx) | 1935-05-16 |
Family
ID=10201426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR781474D Expired FR781474A (xx) | 1934-08-17 |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE404976A (xx) |
| FR (1) | FR781474A (xx) |
| GB (1) | GB439752A (xx) |
| NL (1) | NL40077C (xx) |
-
0
- FR FR781474D patent/FR781474A/fr not_active Expired
- BE BE404976D patent/BE404976A/xx unknown
- NL NL40077D patent/NL40077C/xx active
-
1934
- 1934-08-17 GB GB2379434A patent/GB439752A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE404976A (xx) | |
| NL40077C (xx) | |
| GB439752A (en) | 1935-12-13 |