NL75995C - - Google Patents
Info
- Publication number
- NL75995C NL75995C NL75995DA NL75995C NL 75995 C NL75995 C NL 75995C NL 75995D A NL75995D A NL 75995DA NL 75995 C NL75995 C NL 75995C
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/40—Applications of speech amplifiers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/04—Control of transmission; Equalising
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Structure Of Telephone Exchanges (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB31923/39A GB535124A (en) | 1939-12-11 | 1939-12-11 | Improvements in or relating to carrier telephone and signalling systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL75995C true NL75995C (forum.php) |
Family
ID=10330402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL75995D NL75995C (forum.php) | 1939-12-11 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2280672A (forum.php) |
| BE (1) | BE465689A (forum.php) |
| FR (1) | FR927296A (forum.php) |
| GB (1) | GB535124A (forum.php) |
| NL (1) | NL75995C (forum.php) |
-
0
- BE BE465689D patent/BE465689A/xx unknown
- NL NL75995D patent/NL75995C/xx active
-
1939
- 1939-12-11 GB GB31923/39A patent/GB535124A/en not_active Expired
-
1940
- 1940-11-20 US US366468A patent/US2280672A/en not_active Expired - Lifetime
-
1946
- 1946-04-23 FR FR927296D patent/FR927296A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB535124A (en) | 1941-03-28 |
| BE465689A (forum.php) | |
| US2280672A (en) | 1942-04-21 |
| FR927296A (fr) | 1947-10-24 |