NL39810C - - Google Patents
Info
- Publication number
- NL39810C NL39810C NL39810DA NL39810C NL 39810 C NL39810 C NL 39810C NL 39810D A NL39810D A NL 39810DA NL 39810 C NL39810 C NL 39810C
- Authority
- NL
- Netherlands
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 |
|---|---|---|---|
| GB6227/33A GB415767A (en) | 1933-03-01 | 1933-03-01 | Improvements in alternating current transmission systems such as telephone systems incorporating echo suppressors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL39810C true NL39810C (forum.php) |
Family
ID=9810720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL39810D NL39810C (forum.php) | 1933-03-01 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US1992774A (forum.php) |
| BE (1) | BE401674A (forum.php) |
| DE (1) | DE672795C (forum.php) |
| FR (1) | FR769401A (forum.php) |
| GB (2) | GB415767A (forum.php) |
| NL (1) | NL39810C (forum.php) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE882420C (de) * | 1938-04-12 | 1953-07-09 | Siemens Ag | Schaltungsanordnung fuer Rueckkopplungssperren in Lautfernsprechanlagen |
| US2164344A (en) * | 1938-04-28 | 1939-07-04 | Bell Telephone Labor Inc | Signal transmission system |
| GB561405A (en) * | 1942-11-14 | 1944-05-18 | Automatic Telephone & Elect | Improvements in or relating to telecommunication systems |
| US2511468A (en) * | 1945-01-15 | 1950-06-13 | Telephone Mfg Co Ltd | Electrical control network |
| DE849572C (de) * | 1948-12-09 | 1952-09-15 | Rudolf Wagner | Schaltungsanordnung zur Steuerung des UEbertragungsgrades von Fernmeldeanlagen |
| DE842503C (de) * | 1948-12-09 | 1952-06-26 | Rudolf Wagner | Schaltungsanordnung zur Steuerung des UEbertragungsgrades von Fernmeldeanlagen |
| US2949579A (en) * | 1957-12-27 | 1960-08-16 | Mc Graw Edison Co | Transistor amplifier with a.v.c. |
-
0
- NL NL39810D patent/NL39810C/xx active
- BE BE401674D patent/BE401674A/xx unknown
-
1933
- 1933-03-01 GB GB6227/33A patent/GB415767A/en not_active Expired
- 1933-03-01 GB GB24310/34A patent/GB416372A/en not_active Expired
-
1934
- 1934-02-19 US US711922A patent/US1992774A/en not_active Expired - Lifetime
- 1934-02-25 DE DEG87523D patent/DE672795C/de not_active Expired
- 1934-02-27 FR FR769401D patent/FR769401A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US1992774A (en) | 1935-02-26 |
| FR769401A (fr) | 1934-08-25 |
| DE672795C (de) | 1939-03-10 |
| GB415767A (en) | 1934-09-03 |
| BE401674A (forum.php) | |
| GB416372A (en) | 1934-09-03 |