FR965561A - - Google Patents
Info
- Publication number
- FR965561A FR965561A FR965561DA FR965561A FR 965561 A FR965561 A FR 965561A FR 965561D A FR965561D A FR 965561DA FR 965561 A FR965561 A FR 965561A
- 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 |
|---|---|---|---|
| GB272114X | 1947-04-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR965561A true FR965561A (en, 2012) | 1950-09-15 |
Family
ID=10255966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR965561D Expired FR965561A (en, 2012) | 1947-04-29 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2653999A (en, 2012) |
| CH (1) | CH272114A (en, 2012) |
| FR (1) | FR965561A (en, 2012) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4017695A (en) * | 1974-09-30 | 1977-04-12 | Bell Telephone Laboratories, Incorporated | Customer operated gain control circuit |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1560544A (en) * | 1923-10-25 | 1925-11-10 | American Telephone & Telegraph | Testing circuits for echo suppressors |
| US2025145A (en) * | 1929-10-04 | 1935-12-24 | American Telephone & Telegraph | Transmission system |
| US1855779A (en) * | 1930-07-21 | 1932-04-26 | Associated Electric Lab Inc | Telephone system |
| US2294237A (en) * | 1940-06-05 | 1942-08-25 | Bell Telephone Labor Inc | Telephone circuit |
| US2355958A (en) * | 1942-09-17 | 1944-08-15 | Bell Telephone Labor Inc | Control of two-way signal transmission systems |
-
0
- FR FR965561D patent/FR965561A/fr not_active Expired
-
1948
- 1948-04-13 CH CH272114D patent/CH272114A/de unknown
- 1948-04-22 US US22605A patent/US2653999A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CH272114A (de) | 1950-11-30 |
| US2653999A (en) | 1953-09-29 |