NL27227C - - Google Patents
Info
- Publication number
- NL27227C NL27227C NL27227DA NL27227C NL 27227 C NL27227 C NL 27227C NL 27227D A NL27227D A NL 27227DA NL 27227 C NL27227 C NL 27227C
- 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)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Transducers For Ultrasonic Waves (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US403812A US2085056A (en) | 1929-10-31 | 1929-10-31 | Submarine signaling apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL27227C true NL27227C (en:Method) |
Family
ID=23597083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL27227D NL27227C (en:Method) | 1929-10-31 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2085056A (en:Method) |
| DE (1) | DE653106C (en:Method) |
| GB (1) | GB353089A (en:Method) |
| NL (1) | NL27227C (en:Method) |
-
0
- NL NL27227D patent/NL27227C/xx active
-
1929
- 1929-10-31 US US403812A patent/US2085056A/en not_active Expired - Lifetime
-
1930
- 1930-04-25 GB GB12822/30A patent/GB353089A/en not_active Expired
- 1930-05-06 DE DE1930653106D patent/DE653106C/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB353089A (en) | 1931-07-23 |
| US2085056A (en) | 1937-06-29 |
| DE653106C (de) | 1937-11-15 |