BE440078A - - Google Patents
Info
- Publication number
- BE440078A BE440078A BE440078DA BE440078A BE 440078 A BE440078 A BE 440078A BE 440078D A BE440078D A BE 440078DA BE 440078 A BE440078 A BE 440078A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
- H04M3/26—Arrangements for supervision, monitoring or testing with means for applying test signals or for measuring
- H04M3/28—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor
- H04M3/30—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Monitoring And Testing Of Exchanges (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB15248/39A GB529644A (en) | 1939-05-22 | 1939-05-22 | Improvements in or relating to telephone systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE440078A true BE440078A (enrdf_load_html_response) |
Family
ID=10055691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE440078D BE440078A (enrdf_load_html_response) | 1939-05-22 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2282900A (enrdf_load_html_response) |
| BE (1) | BE440078A (enrdf_load_html_response) |
| GB (1) | GB529644A (enrdf_load_html_response) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3657714A (en) * | 1970-06-10 | 1972-04-18 | Electro Devices Inc | Ground eliminator system |
-
0
- BE BE440078D patent/BE440078A/xx unknown
-
1939
- 1939-05-22 GB GB15248/39A patent/GB529644A/en not_active Expired
-
1940
- 1940-04-13 US US329404A patent/US2282900A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US2282900A (en) | 1942-05-12 |
| GB529644A (en) | 1940-11-26 |