BE540563A - - Google Patents
Info
- Publication number
- BE540563A BE540563A BE540563DA BE540563A BE 540563 A BE540563 A BE 540563A BE 540563D A BE540563D A BE 540563DA BE 540563 A BE540563 A BE 540563A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/08—Indicating faults in circuits or apparatus
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Monitoring And Testing Of Exchanges (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE791457X | 1954-08-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE540563A true BE540563A (en:Method) |
Family
ID=20339681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE540563D BE540563A (en:Method) | 1954-08-13 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2873323A (en:Method) |
| BE (1) | BE540563A (en:Method) |
| FR (1) | FR1135831A (en:Method) |
| GB (1) | GB791457A (en:Method) |
| NL (2) | NL199690A (en:Method) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2635148A (en) * | 1943-05-05 | 1953-04-14 | American Telephone And Telepho | Crossbar telephone system with marker release and lockout of defective line |
| US2513049A (en) * | 1946-09-17 | 1950-06-27 | Stromberg Carlson Co | Automatic combined coder and timed release telephone system |
| US2508052A (en) * | 1948-10-29 | 1950-05-16 | Bell Telephone Labor Inc | Trouble recorder control circuit |
| US2542800A (en) * | 1948-10-29 | 1951-02-20 | Bell Telephone Labor Inc | Variable timed release for registers controlled by register group busy means |
| US2657271A (en) * | 1950-05-19 | 1953-10-27 | Bell Telephone Labor Inc | Line identification trouble indicator |
-
0
- BE BE540563D patent/BE540563A/xx unknown
- NL NL103508D patent/NL103508C/xx active
- NL NL199690D patent/NL199690A/xx unknown
-
1955
- 1955-08-12 FR FR1135831D patent/FR1135831A/fr not_active Expired
- 1955-08-12 GB GB23346/55A patent/GB791457A/en not_active Expired
- 1955-08-12 US US528022A patent/US2873323A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| NL199690A (en:Method) | |
| NL103508C (en:Method) | |
| US2873323A (en) | 1959-02-10 |
| FR1135831A (fr) | 1957-05-03 |
| GB791457A (en) | 1958-03-05 |