FR714251A - - Google Patents
Info
- Publication number
- FR714251A FR714251A FR714251DA FR714251A FR 714251 A FR714251 A FR 714251A FR 714251D A FR714251D A FR 714251DA FR 714251 A FR714251 A FR 714251A
- 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
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR371664X | 1930-07-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR714251A true FR714251A (xx) | 1931-11-19 |
Family
ID=8894717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR714251D Expired FR714251A (xx) | 1930-07-03 |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE380454A (xx) |
| FR (1) | FR714251A (xx) |
| GB (1) | GB371664A (xx) |
-
0
- BE BE380454D patent/BE380454A/xx unknown
- FR FR714251D patent/FR714251A/fr not_active Expired
-
1931
- 1931-06-09 GB GB16825/31A patent/GB371664A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB371664A (en) | 1932-04-28 |
| BE380454A (xx) |