FR954492A - - Google Patents
Info
- Publication number
- FR954492A FR954492A FR954492DA FR954492A FR 954492 A FR954492 A FR 954492A FR 954492D A FR954492D A FR 954492DA FR 954492 A FR954492 A FR 954492A
- 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
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C23/00—Non-electrical signal transmission systems, e.g. optical systems
- G08C23/02—Non-electrical signal transmission systems, e.g. optical systems using infrasonic, sonic or ultrasonic waves
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR954492A true FR954492A (en) | 1950-01-03 |
Family
ID=1557390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR954492D Expired FR954492A (en) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR954492A (en) |
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0
- FR FR954492D patent/FR954492A/fr not_active Expired