FR553845A - - Google Patents
Info
- Publication number
- FR553845A FR553845A FR553845DA FR553845A FR 553845 A FR553845 A FR 553845A FR 553845D A FR553845D A FR 553845DA FR 553845 A FR553845 A FR 553845A
- Authority
- FR
- France
- 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
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/002—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems
- H04M9/005—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems with subscriber controlled access to an exchange line
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR553845A true FR553845A (online.php) | 1923-05-31 |
Family
ID=1538518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR553845D Expired FR553845A (online.php) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR553845A (online.php) |
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0
- FR FR553845D patent/FR553845A/fr not_active Expired