FR742932A - - Google Patents
Info
- Publication number
- FR742932A FR742932A FR742932DA FR742932A FR 742932 A FR742932 A FR 742932A FR 742932D A FR742932D A FR 742932DA FR 742932 A FR742932 A FR 742932A
- 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
- H04M3/40—Applications of speech amplifiers
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR742932A true FR742932A (en) | 1933-03-18 |
Family
ID=1547261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR742932D Expired FR742932A (en) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR742932A (en) |
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0
- FR FR742932D patent/FR742932A/fr not_active Expired