NL55792C - - Google Patents
Info
- Publication number
- NL55792C NL55792C NL55792DA NL55792C NL 55792 C NL55792 C NL 55792C NL 55792D A NL55792D A NL 55792DA NL 55792 C NL55792 C NL 55792C
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
-
- 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 |
|---|---|---|---|
| US236453A US2251997A (en) | 1938-10-22 | 1938-10-22 | Directional radio system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL55792C true NL55792C (US06373033-20020416-M00002.png) |
Family
ID=22889564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL55792D NL55792C (US06373033-20020416-M00002.png) | 1938-10-22 |
Country Status (6)
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2527547A (en) * | 1941-02-10 | 1950-10-31 | Int Standard Electric Corp | Self-contained radio guiding apparatus for mobile craft |
| NL62600C (US06373033-20020416-M00002.png) * | 1942-10-02 | |||
| US2478781A (en) * | 1944-06-02 | 1949-08-09 | Bell Telephone Labor Inc | Circuit maker and breaker |
| US2496242A (en) * | 1944-07-22 | 1950-01-31 | Philco Corp | Antenna system |
| US2441615A (en) * | 1945-01-17 | 1948-05-18 | Rca Corp | Antenna system |
| US2557941A (en) * | 1945-07-07 | 1951-06-26 | Standard Telephones Cables Ltd | Directive antenna |
| US2471215A (en) * | 1945-09-27 | 1949-05-24 | Pye Ltd | Radio antenna |
| US2480186A (en) * | 1945-10-10 | 1949-08-30 | Us Sec War | Antenna |
| US2479227A (en) * | 1945-11-06 | 1949-08-16 | Edgar N Gilbert | Dual frequency antenna |
| US2479272A (en) * | 1945-12-10 | 1949-08-16 | Robert M Silliman | Antenna |
| US2472274A (en) * | 1946-04-23 | 1949-06-07 | Rca Corp | High-frequency coaxial cable switch |
| US2615131A (en) * | 1946-09-12 | 1952-10-21 | Rca Corp | Antenna and matching circuit |
| US2642495A (en) * | 1947-08-21 | 1953-06-16 | Ethel M George | Coaxial transmission line switch |
| US2644928A (en) * | 1948-06-09 | 1953-07-07 | Rca Corp | Directional transmission line transducer |
| US2571368A (en) * | 1949-03-11 | 1951-10-16 | Leonard R Kahn | Aircraft radio range system |
| US2635176A (en) * | 1949-09-01 | 1953-04-14 | Rca Corp | Radio-frequency heating system |
| US2660710A (en) * | 1951-07-09 | 1953-11-24 | Bendix Aviat Corp | High-frequency coupling system |
| US2716219A (en) * | 1951-08-31 | 1955-08-23 | Du Mont Allen B Lab Inc | Mixer circuit |
| US3175219A (en) * | 1961-06-20 | 1965-03-23 | Gen Dynamics Corp | Circular dipole array with central reflector and switching system for beam steering |
| GB1579452A (en) * | 1977-06-23 | 1980-11-19 | Npp Teshka Radioelektronika | Aerial system |
-
0
- NL NL55792D patent/NL55792C/xx active
- BE BE435055D patent/BE435055A/xx unknown
-
1938
- 1938-10-22 US US236453A patent/US2251997A/en not_active Expired - Lifetime
-
1939
- 1939-06-20 FR FR866437D patent/FR866437A/fr not_active Expired
- 1939-07-04 CH CH215432D patent/CH215432A/fr unknown
- 1939-10-22 DE DEL99289D patent/DE734357C/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CH215432A (fr) | 1941-06-30 |
| FR866437A (fr) | 1941-08-12 |
| BE435055A (US06373033-20020416-M00002.png) | |
| DE734357C (de) | 1943-04-14 |
| US2251997A (en) | 1941-08-12 |
