FR683884A - - Google Patents
Info
- Publication number
- FR683884A FR683884A FR683884DA FR683884A FR 683884 A FR683884 A FR 683884A FR 683884D A FR683884D A FR 683884DA FR 683884 A FR683884 A FR 683884A
- 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)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US341540A US1772550A (en) | 1929-02-20 | 1929-02-20 | Echo suppressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR683884A true FR683884A (en) | 1930-07-03 |
Family
ID=23338011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR683884D Expired FR683884A (en) | 1929-02-20 |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US1772550A (en) |
| FR (1) | FR683884A (en) |
-
0
- FR FR683884D patent/FR683884A/fr not_active Expired
-
1929
- 1929-02-20 US US341540A patent/US1772550A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US1772550A (en) | 1930-08-12 |