NL29670C - - Google Patents
Info
- Publication number
- NL29670C NL29670C NL29670DA NL29670C NL 29670 C NL29670 C NL 29670C NL 29670D A NL29670D A NL 29670DA NL 29670 C NL29670 C NL 29670C
- 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)
- Reciprocating Pumps (AREA)
- Special Spraying Apparatus (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1880428A GB319084A (en) | 1928-06-28 | 1928-06-28 | Improvements in sound transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL29670C true NL29670C (pl) |
Family
ID=10118701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL29670D NL29670C (pl) | 1928-06-28 |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE485478C (pl) |
| FR (1) | FR656979A (pl) |
| GB (1) | GB319084A (pl) |
| NL (1) | NL29670C (pl) |
-
0
- NL NL29670D patent/NL29670C/xx active
-
1928
- 1928-06-28 GB GB1880428A patent/GB319084A/en not_active Expired
- 1928-06-30 DE DEW79754D patent/DE485478C/de not_active Expired
- 1928-07-04 FR FR656979D patent/FR656979A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE485478C (de) | 1929-11-15 |
| FR656979A (fr) | 1929-05-17 |
| GB319084A (en) | 1929-09-19 |