NL70924C - - Google Patents
Info
- Publication number
- NL70924C NL70924C NL70924DA NL70924C NL 70924 C NL70924 C NL 70924C NL 70924D A NL70924D A NL 70924DA NL 70924 C NL70924 C NL 70924C
- 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)
- Amplifiers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US297832A US2224569A (en) | 1939-10-04 | 1939-10-04 | Control of transmission in two-way signaling systems |
Publications (1)
Publication Number | Publication Date |
---|---|
NL70924C true NL70924C (sv) |
Family
ID=23147926
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NL70924D NL70924C (sv) | 1939-10-04 |
Country Status (5)
Country | Link |
---|---|
US (1) | US2224569A (sv) |
BE (1) | BE475750A (sv) |
FR (1) | FR949301A (sv) |
GB (1) | GB628348A (sv) |
NL (1) | NL70924C (sv) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH303090A (de) * | 1949-10-11 | 1954-11-15 | Nederlanden Staat | Gabelschaltung. |
US2632052A (en) * | 1950-11-02 | 1953-03-17 | Bell Telephone Labor Inc | Transmission control in two-way signaling system |
NL290910A (sv) * | 1962-03-30 | |||
US5471527A (en) * | 1993-12-02 | 1995-11-28 | Dsc Communications Corporation | Voice enhancement system and method |
CN118555373A (zh) * | 2024-07-29 | 2024-08-27 | 广东柔乐电器有限公司 | 二线低功耗可视对讲门禁系统 |
-
0
- NL NL70924D patent/NL70924C/xx active
- BE BE475750D patent/BE475750A/xx unknown
-
1939
- 1939-10-04 US US297832A patent/US2224569A/en not_active Expired - Lifetime
-
1947
- 1947-07-10 FR FR949301D patent/FR949301A/fr not_active Expired
- 1947-07-18 GB GB19261/47A patent/GB628348A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2224569A (en) | 1940-12-10 |
GB628348A (en) | 1949-08-26 |
BE475750A (sv) | |
FR949301A (fr) | 1949-08-26 |