FR978920A - Perfectionnements aux téléphones - Google Patents
Perfectionnements aux téléphonesInfo
- Publication number
- FR978920A FR978920A FR978920DA FR978920A FR 978920 A FR978920 A FR 978920A FR 978920D A FR978920D A FR 978920DA FR 978920 A FR978920 A FR 978920A
- Authority
- FR
- France
- Prior art keywords
- enhancements
- phone
- phone enhancements
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H04Q3/0004—Selecting arrangements using crossbar selectors in the switching stages
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Structure Of Telephone Exchanges (AREA)
- Monitoring And Testing Of Exchanges (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB148048A GB656559A (en) | 1948-01-16 | 1948-01-16 | Improvements in or relating to telephone systems |
GB2112548 | 1948-08-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR978920A true FR978920A (fr) | 1951-04-19 |
Family
ID=34227859
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR978920D Expired FR978920A (fr) | 1948-01-16 | 1949-01-13 | Perfectionnements aux téléphones |
Country Status (5)
Country | Link |
---|---|
BE (1) | BE486835A (fr) |
CH (1) | CH288596A (fr) |
DE (1) | DE865468C (fr) |
FR (1) | FR978920A (fr) |
GB (1) | GB656559A (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE973318C (de) * | 1950-11-18 | 1960-03-03 | Standard Elek K Lorenz Ag | Schaltungsanordnung fuer Fernsprechnebenstellenanlagen |
-
1948
- 1948-01-16 GB GB148048A patent/GB656559A/en not_active Expired
-
1949
- 1949-01-11 CH CH288596D patent/CH288596A/fr unknown
- 1949-01-13 FR FR978920D patent/FR978920A/fr not_active Expired
- 1949-01-15 DE DEP31684A patent/DE865468C/de not_active Expired
- 1949-01-17 BE BE486835D patent/BE486835A/fr unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE973318C (de) * | 1950-11-18 | 1960-03-03 | Standard Elek K Lorenz Ag | Schaltungsanordnung fuer Fernsprechnebenstellenanlagen |
Also Published As
Publication number | Publication date |
---|---|
CH288596A (fr) | 1953-01-31 |
GB656559A (en) | 1951-08-29 |
DE865468C (de) | 1953-02-02 |
BE486835A (fr) | 1949-02-15 |
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