FR72935E - Systems for recording, retrieving and modifying information in telecommunications systems - Google Patents
Systems for recording, retrieving and modifying information in telecommunications systemsInfo
- Publication number
- FR72935E FR72935E FR749379A FR749379A FR72935E FR 72935 E FR72935 E FR 72935E FR 749379 A FR749379 A FR 749379A FR 749379 A FR749379 A FR 749379A FR 72935 E FR72935 E FR 72935E
- Authority
- FR
- France
- Prior art keywords
- systems
- retrieving
- recording
- modifying information
- telecommunications
- 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
- H04M—TELEPHONIC COMMUNICATION
- H04M5/00—Manual exchanges
- H04M5/16—Manual exchanges with means for reducing interference; with means for reducing effects due to line faults
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR749379A FR72935E (en) | 1953-05-22 | 1957-10-14 | Systems for recording, retrieving and modifying information in telecommunications systems |
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1448053A GB763828A (en) | 1953-05-22 | 1953-05-22 | Improvements in or relating to subscriber billing in automatic telecommunication exchange systems and the like |
DEST11765A DE1041098B (en) | 1953-05-22 | 1956-10-05 | Arrangement for monitoring the condition of lines in telecommunications, preferably telephone systems |
US61608156A | 1956-10-15 | 1956-10-15 | |
US61602556A | 1956-10-15 | 1956-10-15 | |
FR749379A FR72935E (en) | 1953-05-22 | 1957-10-14 | Systems for recording, retrieving and modifying information in telecommunications systems |
Publications (1)
Publication Number | Publication Date |
---|---|
FR72935E true FR72935E (en) | 1960-09-21 |
Family
ID=27512231
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR749379A Expired FR72935E (en) | 1953-05-22 | 1957-10-14 | Systems for recording, retrieving and modifying information in telecommunications systems |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR72935E (en) |
-
1957
- 1957-10-14 FR FR749379A patent/FR72935E/en not_active Expired
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