FR999238A - - Google Patents
Info
- Publication number
- FR999238A FR999238A FR999238DA FR999238A FR 999238 A FR999238 A FR 999238A FR 999238D A FR999238D A FR 999238DA FR 999238 A FR999238 A FR 999238A
- 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
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR999238A true FR999238A (fr) | 1952-01-29 |
Family
ID=1567195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR999238D Expired FR999238A (fr) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR999238A (fr) |
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0
- FR FR999238D patent/FR999238A/fr not_active Expired