FR577889A - - Google Patents
Info
- Publication number
- FR577889A FR577889A FR577889DA FR577889A FR 577889 A FR577889 A FR 577889A FR 577889D A FR577889D A FR 577889DA FR 577889 A FR577889 A FR 577889A
- 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
- 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)
- Telephone Set Structure (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES61573D DE433940C (de) | 1922-12-05 | 1922-12-05 | Einrichtung zur eindeutigen Richtungsbestimmung von Schallwellen nach dem binauralen Verfahren |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR577889A true FR577889A (de) | 1924-08-12 |
Family
ID=7494968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR577889D Expired FR577889A (de) | 1922-12-05 |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE433940C (de) |
| FR (1) | FR577889A (de) |
| GB (1) | GB207828A (de) |
-
0
- FR FR577889D patent/FR577889A/fr not_active Expired
-
1922
- 1922-12-05 DE DES61573D patent/DE433940C/de not_active Expired
-
1923
- 1923-12-03 GB GB3040423A patent/GB207828A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE433940C (de) | 1926-09-16 |
| GB207828A (de) | 1924-05-29 |