BE431681A - - Google Patents
Info
- Publication number
- BE431681A BE431681A BE431681DA BE431681A BE 431681 A BE431681 A BE 431681A BE 431681D A BE431681D A BE 431681DA BE 431681 A BE431681 A BE 431681A
- 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
- G01S1/02—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 radio 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)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE228970X | 1938-06-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE431681A true BE431681A (nl) |
Family
ID=5867521
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE131681D BE131681A (nl) | 1938-06-07 | ||
| BE431681D BE431681A (nl) | 1938-06-07 |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE131681D BE131681A (nl) | 1938-06-07 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2241907A (nl) |
| BE (2) | BE431681A (nl) |
| CH (1) | CH228970A (nl) |
| FR (1) | FR847558A (nl) |
| NL (1) | NL52439C (nl) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2536112A (en) * | 1943-11-22 | 1951-01-02 | Sperry Corp | Aircraft landing system |
-
0
- BE BE131681D patent/BE131681A/xx unknown
- BE BE431681D patent/BE431681A/xx unknown
- NL NL52439D patent/NL52439C/xx active
-
1938
- 1938-12-03 CH CH228970D patent/CH228970A/de unknown
- 1938-12-07 US US244440A patent/US2241907A/en not_active Expired - Lifetime
- 1938-12-14 FR FR847558D patent/FR847558A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL52439C (nl) | |
| BE131681A (nl) | |
| FR847558A (fr) | 1939-10-12 |
| US2241907A (en) | 1941-05-13 |
| CH228970A (de) | 1943-09-30 |