NL72107C - - Google Patents
Info
- Publication number
- NL72107C NL72107C NL72107DA NL72107C NL 72107 C NL72107 C NL 72107C NL 72107D A NL72107D A NL 72107DA NL 72107 C NL72107 C NL 72107C
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
- H01Q19/12—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces wherein the surfaces are concave
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR971260T | 1940-02-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL72107C true NL72107C (en:Method) |
Family
ID=9512011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL72107D NL72107C (en:Method) | 1940-02-29 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2559092A (en:Method) |
| CH (1) | CH268704A (en:Method) |
| FR (1) | FR971260A (en:Method) |
| GB (1) | GB643738A (en:Method) |
| NL (1) | NL72107C (en:Method) |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1345056A (en) * | 1916-08-02 | 1920-06-29 | Winston Overton | Headlight |
| US1559212A (en) * | 1920-05-03 | 1925-10-27 | Winston Overton | Reflector for headlights |
| US1735377A (en) * | 1927-10-19 | 1929-11-12 | Martha W Caughlan | Reflecting surface |
| US1932469A (en) * | 1929-12-02 | 1933-10-31 | Telefunken Gmbh | Short wave signaling |
| US1805886A (en) * | 1930-10-31 | 1931-05-19 | Conrad K Rizer | Headlight |
| NL38496C (en:Method) * | 1932-07-06 | |||
| GB436355A (en) * | 1934-04-13 | 1935-10-09 | Meaf Mach En Apparaten Fab Nv | A new or improved method of and apparatus for clustering short and ultra-short electro-magnetic waves |
| FR781464A (fr) * | 1934-06-30 | 1935-05-16 | Phare pour véhicules automobiles, vélos, avions, etc. | |
| DE706661C (de) * | 1936-01-17 | 1941-05-31 | Telefunken Gmbh | Richtsendeanlage mit zwei voneinander unabhaengigen Richtcharakteristiken |
| US2423073A (en) * | 1941-06-13 | 1947-06-24 | Standard Telephones Cables Ltd | Electromagnetic wave radiator |
| NL73349C (en:Method) * | 1941-11-28 | |||
| US2408373A (en) * | 1945-01-13 | 1946-10-01 | Chu Lan Jen | Antenna |
-
0
- NL NL72107D patent/NL72107C/xx active
-
1940
- 1940-02-29 FR FR971260D patent/FR971260A/fr not_active Expired
-
1947
- 1947-08-07 US US767097A patent/US2559092A/en not_active Expired - Lifetime
- 1947-08-14 GB GB22667/47A patent/GB643738A/en not_active Expired
- 1947-09-08 CH CH268704D patent/CH268704A/fr unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FR971260A (fr) | 1951-01-15 |
| US2559092A (en) | 1951-07-03 |
| GB643738A (en) | 1950-09-27 |
| CH268704A (fr) | 1950-05-31 |