Patent US3335418A successfully refreshed from Google Patents.
US3335418A
Expired / Lapsed
US
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System for localizing radio communications
Assignee: International Standard Electric Corp
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Filing: 1964-03-04
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Granted: 1967-08-08
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Expires: 1984-03-04
Abstract
No abstract record available.
Inventors
- 👤 Earp Charles William
- 👤 Cleaver Richard Francis
- 👤 Sothcott Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:33
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02; H; H04; H04B; H04B7/00; H04B7/02; H04B7/022
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A RADIO COMMUNICATION SYSTEM COMPRISING AT LEAST ONE CRAFT OR VEHICLE AND A PLURALITY OF SEPARATE TRANSMITTING STATIONS INCLUDING MEANS AT EACH STATION FOR RADIATING AN ELECTROMAGNETIC BEAM AND MEANS FOR CONTROLLING THE POSITIONS OF THE BEAMS IN DEPENDENCE UPON RESPECTIVE BEARINGS OF SAID CRAFT OR VEHICLE FROM THE TRANSMITTING STATIONS SO THAT THEY INTERSECT AT THE CRAFT OR VEHICLE, AND A RECEIVER IN SAID CRAFT OR VEHICLE INCLUDING MEANS FOR RECEIVING THE RADIATIONS OF THE BEAMS, MEANS FOR PRODUCING A BEAT FREQUENCY SIGNAL FROM THE RADIATIONS AND INDICATING MEANS OPERATED IN RESPONSE TO THE PRESENCE OF THE BEAT FREQUENCY SIGNAL.
Claim 2
Dependent Claim
101 words
A RADIO COMMUNICATION SYSTEM COMPRISING AT LEAST ONE CRAFT OR VEHICLE AND A PLURALITY OF SEPARATE TRANSMITTING STATIONS INCLUDING MEANS AT EACH STATION FOR RADIATING AN ELECTROMAGNETIC BEAM AND MEANS FOR CONTROLLING THE POSITIONS OF THE BEAMS IN DEPENDENCE UPON RESPECTIVE BEARINGS OF SAID CRAFT OR VEHICLE FROM THE TRANSMITTING STATIONS SO THAT THEY INTERSECT AT THE CRAFT OR VEHICLE, AND A RECEIVER IN SAID CRAFT OR VEHICLE INCLUDING MEANS FOR RECEIVING THE RADIATIONS OF THE BEAMS, MEANS FOR PRODUCING A BEAT FREQUENCY SIGNAL FROM THE RADIATIONS AND INDICATING MEANS OPERATED IN RESPONSE TO THE PRESENCE OF THE BEAT FREQUENCY SIGNAL.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-07 | 1971-02-06 | 1971-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-07 | 1975-02-06 | 1975-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-07 | 1979-02-06 | 1979-08-08 | $7700.00 | Window Closed / Lapsed |