US3118141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio direction finding system
Assignee: Individual
•
Filing: 1961-12-27
•
Granted: 1964-01-14
•
Expires: 1981-12-27
Abstract
No abstract record available.
Inventors
- 👤 Bailey Albert David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:41
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
117 words
A RADIO DIRECTION FINDING SYSTEM FOR OBTAINING THE DIRECTION OF ARRIVAL OF A RADIO SIGNAL WITH AN ACCURACY THAT IS CONSIDERABLY BETTER THAN THAT OBTAINED WITH CONVENTIONAL SMALL APERTURE RADIO DIRECTION FINDING SYSTEMS COMPRISING MEANS FOR DISPLAYING ON THE FACE OF A CATHODE RAY TUBE AN APPARENT BEARING INDICATION WHICH IS A MULTI-VALUED FUNCTION OF FREQUENCY, AZIMUTH AND ELEVATION ANGLE OF ARRIVAL OF THE RADIO SIGNAL, MEANS RECEIVING INPUTS PROPORTIONAL FREQUENCY, AZIMUTH AND ELEVATION ANGLE OF ARRIVAL OF THE RADIO SIGNAL FOR DISPLAYING A CURSOR ON THE FACE OF SAID CATHODE RAY TUBE AND MEANS TO VARY THE SAID INPUT PROPORTIONAL TO AZIMUTH SO AS TO MAKE THE SAID CURSOR COINCIDE WITH THE SAID APPARENT BEARING INDICATION.
References Cited (Backward Citations)
US3025520A
Cited
US3060427A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-01-13 | 1967-07-15 | 1968-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-13 | 1971-07-15 | 1972-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-13 | 1975-07-15 | 1976-01-14 | $7700.00 | Window Closed / Lapsed |