LU30973A1 - - Google Patents
Info
- Publication number
- LU30973A1 LU30973A1 LU30973DA LU30973A1 LU 30973 A1 LU30973 A1 LU 30973A1 LU 30973D A LU30973D A LU 30973DA LU 30973 A1 LU30973 A1 LU 30973A1
- Authority
- LU
- Luxembourg
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H04Q3/0016—Arrangements providing connection between exchanges
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Telephonic Communication Services (AREA)
- Exchange Systems With Centralized Control (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE301278X | 1950-12-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| LU30973A1 true LU30973A1 (xx) |
Family
ID=6099070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| LU30973D LU30973A1 (xx) | 1950-12-20 |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US2803705A (xx) |
| BE (1) | BE507124A (xx) |
| CH (1) | CH301278A (xx) |
| FR (1) | FR1048874A (xx) |
| GB (1) | GB718438A (xx) |
| LU (1) | LU30973A1 (xx) |
| NL (2) | NL86168C (xx) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB516416A (en) * | 1938-06-14 | 1940-01-01 | Ass Telephone & Telegraph Co | Improvements in or relating to automatic or semi-automatic telephone systems |
| CH255842A (de) * | 1941-07-11 | 1948-07-15 | Standard Telephon & Radio Ag | Fernmeldeanlage. |
| US2554155A (en) * | 1946-12-13 | 1951-05-22 | Bell Telephone Labor Inc | Ground trainer for training aircraft crews |
| NL84066C (xx) * | 1949-01-29 | |||
| US2597209A (en) * | 1950-02-11 | 1952-05-20 | Automatic Elect Lab | Telephone system |
-
0
- BE BE507124D patent/BE507124A/xx unknown
- LU LU30973D patent/LU30973A1/xx unknown
- NL NL7608618.A patent/NL164083B/xx unknown
- NL NL86168D patent/NL86168C/xx active
-
1951
- 1951-08-27 CH CH301278D patent/CH301278A/de unknown
- 1951-10-17 FR FR1048874D patent/FR1048874A/fr not_active Expired
- 1951-10-31 GB GB25507/51A patent/GB718438A/en not_active Expired
- 1951-12-17 US US262002A patent/US2803705A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| NL86168C (xx) | |
| NL164083B (nl) | |
| BE507124A (xx) | |
| GB718438A (en) | 1954-11-17 |
| US2803705A (en) | 1957-08-20 |
| CH301278A (de) | 1954-08-31 |
| FR1048874A (fr) | 1953-12-24 |