FR664324A - - Google Patents
Info
- Publication number
- FR664324A FR664324A FR664324DA FR664324A FR 664324 A FR664324 A FR 664324A FR 664324D A FR664324D A FR 664324DA FR 664324 A FR664324 A FR 664324A
- 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 |
---|---|
FR664324A true FR664324A (fr) | 1929-09-10 |
Family
ID=1543308
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR664324D Expired FR664324A (fr) |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR664324A (fr) |
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0
- FR FR664324D patent/FR664324A/fr not_active Expired