FR742039A - - Google Patents
Info
- Publication number
- FR742039A FR742039A FR742039DA FR742039A FR 742039 A FR742039 A FR 742039A FR 742039D A FR742039D A FR 742039DA FR 742039 A FR742039 A FR 742039A
- 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
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
- G01S3/80—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using ultrasonic, sonic or infrasonic waves
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR742039A true FR742039A (da) | 1933-02-24 |
Family
ID=1546497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR742039D Expired FR742039A (da) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR742039A (da) |
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0
- FR FR742039D patent/FR742039A/fr not_active Expired