BE422902A - - Google Patents
Info
- Publication number
- BE422902A BE422902A BE422902DA BE422902A BE 422902 A BE422902 A BE 422902A BE 422902D A BE422902D A BE 422902DA BE 422902 A BE422902 A BE 422902A
- Authority
- BE
- Belgium
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
- G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
- G01S1/72—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using ultrasonic, sonic or infrasonic waves
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR825083T | 1937-07-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE422902A true BE422902A (en:Method) |
Family
ID=9282151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE422902D BE422902A (en:Method) | 1937-07-31 |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE422902A (en:Method) |
| FR (1) | FR825083A (en:Method) |
-
0
- BE BE422902D patent/BE422902A/xx unknown
-
1937
- 1937-07-31 FR FR825083D patent/FR825083A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR825083A (fr) | 1938-02-23 |