FR583431A - - Google Patents
Info
- Publication number
- FR583431A FR583431A FR583431DA FR583431A FR 583431 A FR583431 A FR 583431A FR 583431D A FR583431D A FR 583431DA FR 583431 A FR583431 A FR 583431A
- 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
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
- H04M1/62—Constructional arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR583431A true FR583431A (es) | 1925-01-13 |
Family
ID=1539778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR583431D Expired FR583431A (es) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR583431A (es) |
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0
- FR FR583431D patent/FR583431A/fr not_active Expired