FR654309A - - Google Patents
Info
- Publication number
- FR654309A FR654309A FR654309DA FR654309A FR 654309 A FR654309 A FR 654309A FR 654309D A FR654309D A FR 654309DA FR 654309 A FR654309 A FR 654309A
- 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 |
|---|---|
| FR654309A true FR654309A (en) | 1929-04-03 |
Family
ID=1543028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR654309D Expired FR654309A (en) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR654309A (en) |
-
0
- FR FR654309D patent/FR654309A/fr not_active Expired