GB718438A - Improvements in or relating to circuit arrangements for telephone installations - Google Patents
Improvements in or relating to circuit arrangements for telephone installationsInfo
- Publication number
- GB718438A GB718438A GB25507/51A GB2550751A GB718438A GB 718438 A GB718438 A GB 718438A GB 25507/51 A GB25507/51 A GB 25507/51A GB 2550751 A GB2550751 A GB 2550751A GB 718438 A GB718438 A GB 718438A
- Authority
- GB
- United Kingdom
- Prior art keywords
- exchange
- digits
- switch
- exchanges
- tertiary
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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)
- Exchange Systems With Centralized Control (AREA)
- Telephonic Communication Services (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE301278X | 1950-12-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB718438A true GB718438A (en) | 1954-11-17 |
Family
ID=6099070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB25507/51A Expired GB718438A (en) | 1950-12-20 | 1951-10-31 | Improvements in or relating to circuit arrangements for telephone installations |
Country Status (7)
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB516348A (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 |
| NL151089B (nl) * | 1949-01-29 | Organon Labor Ltd | Werkwijze voor het bereiden van 2beta-amino-3alfa-hydroxy-5alfa-androstaanderivaten, alsmede werkwijze ter bereiding van farmaceutische preparaten en aldus verkregen gevormde preparaten. | |
| US2597209A (en) * | 1950-02-11 | 1952-05-20 | Automatic Elect Lab | Telephone system |
-
0
- LU LU30973D patent/LU30973A1/xx unknown
- NL NL7608618.A patent/NL164083B/xx unknown
- NL NL86168D patent/NL86168C/xx active
- BE BE507124D patent/BE507124A/xx unknown
-
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 |
|---|---|
| NL164083B (nl) | |
| US2803705A (en) | 1957-08-20 |
| NL86168C (US08088918-20120103-C00476.png) | |
| LU30973A1 (US08088918-20120103-C00476.png) | |
| CH301278A (de) | 1954-08-31 |
| BE507124A (US08088918-20120103-C00476.png) | |
| FR1048874A (fr) | 1953-12-24 |
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| Publication | Publication Date | Title |
|---|---|---|
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| GB462180A (en) | Improvements in or relating to automatic or semi-automatic telephone or like exchange systems | |
| SU36486A1 (ru) | Релейный регистр дл автоматических телефонных станций | |
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