Position finding system
Abstract
Abstract A POSITION FINDING SYSTEM IS PROVIDED WHICH COMPRISES FOUR TRANSMITTING STATIONS, A FIRST PAIR OF WHICH PRODUCES A FIRST HYPERBOLIC POSITION LINE SYSTEM AND A SECOND PAIR OF WHICH PRODUCES A SECOND INTERSECTING HYPERBOLIC POSITION LINE SYSTEM. FIRST TRANSMITTERS OF EACH PAIR TRANSMIT UNMODULATED HIGH FREQUENCY WAVES IN FIRST AND SECOND CHANNELS RESPECTIVELY AND SECOND TRANSMITTERS OF EACH PAIR TRANSMIT HIGH FREQUENCY CARRIER WAVES IN THE FIRST AND SECOND CHANNELS RESPECTIVELY, EACH CARRIER WAVE BEING MODULATED WITH A DEGREE OF MODULATION LESS THAN 1 BY A DIFFERENT LOW FREQUENCY. THE MODULATION LESS THAN 1 BY TRANSMITTER OF THE FIRST PAIR IS EQUAL TO THE BEAT FREQUENCY OF THE HIGH FREQUENCY UNMODULATED AND CARRIER WAVES OF THE SECOND CHANNEL AND THE MODULATION OF THE SECOND TRANSMITTER OF THE SECOND PAIR IS EQUAL TO THE EAT FREQUENCY OF THE HIGH FREQUENCY UNMODULATED AND CARRIER WAVES OF THE FIRST CHANNEL.
Inventors
- 👤 Pierre Laurent
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |