NL28962C - - Google Patents
Info
- Publication number
- NL28962C NL28962C NL28962DA NL28962C NL 28962 C NL28962 C NL 28962C NL 28962D A NL28962D A NL 28962DA NL 28962 C NL28962 C NL 28962C
- Authority
- NL
- Netherlands
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)
- Geophysics And Detection Of Objects (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES90465D DE542483C (de) | 1929-03-13 | 1929-03-13 | Vorrichtung zur Richtungsbestimmung von Schallwellen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL28962C true NL28962C (ru) |
Family
ID=7515833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL28962D NL28962C (ru) | 1929-03-13 |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE542483C (ru) |
| NL (1) | NL28962C (ru) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2987700A (en) * | 1943-09-02 | 1961-06-06 | John N A Hawkins | Differentially sensitive sonic detector |
-
0
- NL NL28962D patent/NL28962C/xx active
-
1929
- 1929-03-13 DE DES90465D patent/DE542483C/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE542483C (de) | 1932-01-25 |