FR543758A - - Google Patents
Info
- Publication number
- FR543758A FR543758A FR543758DA FR543758A FR 543758 A FR543758 A FR 543758A FR 543758D A FR543758D A FR 543758DA FR 543758 A FR543758 A FR 543758A
- 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
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/60—Semi-automatic systems, i.e. in which the numerical selection of the outgoing line is under the control of an operator
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR543758A true FR543758A (fr) | 1922-09-08 |
Family
ID=1537680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR543758D Expired FR543758A (fr) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR543758A (fr) |
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0
- FR FR543758D patent/FR543758A/fr not_active Expired