NL57680C - - Google Patents
Info
- Publication number
- NL57680C NL57680C NL57680DA NL57680C NL 57680 C NL57680 C NL 57680C NL 57680D A NL57680D A NL 57680DA NL 57680 C NL57680 C NL 57680C
- 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
- G01S11/00—Systems for determining distance or velocity not using reflection or reradiation
- G01S11/02—Systems for determining distance or velocity not using reflection or reradiation using radio waves
- G01S11/023—Systems for determining distance or velocity not using reflection or reradiation using radio waves using impedance elements varying with distance
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Radar Systems Or Details Thereof (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2230537X | 1939-02-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL57680C true NL57680C (https=) |
Family
ID=7991361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL57680D NL57680C (https=) | 1939-02-07 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2230537A (https=) |
| FR (1) | FR870996A (https=) |
| NL (1) | NL57680C (https=) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB563469A (en) * | 1942-05-06 | 1944-08-16 | Gen Electric Co Ltd | Improvements in blind-landing devices for aircraft |
| US4585209A (en) * | 1983-10-27 | 1986-04-29 | Harry E. Aine | Miniature valve and method of making same |
-
0
- NL NL57680D patent/NL57680C/xx active
-
1940
- 1940-03-21 US US325266A patent/US2230537A/en not_active Expired - Lifetime
-
1941
- 1941-03-20 FR FR870996D patent/FR870996A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2230537A (en) | 1941-02-04 |
| FR870996A (fr) | 1942-04-01 |