Patent JPS6055964A successfully refreshed from Google Patents.
US3560977A
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US
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Aerial follower device
Assignee: US Philips Corp
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Filing: 1969-04-03
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Granted: 1971-02-02
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Expires: 1989-04-03
Abstract
Abstract A TRANSMITTER HAS AN ANTENNA THAT HAS TWO SECTIONS WHICH TRANSMIT HORIZONTALLY AND VERTICALLY POLARIZED RADIATION WITH A 90 DEGREE PHASE SHIFT. A RECEIVER HAS AN ANTENNA WHICH HAS TWO SECTIONS FOR RECEIVING VERTICALLY AND HORIZONTALLY POLARIZED RADIATION. BY COMPARING THE PHASE OF THE RECEIVED RADIATION, THE TRANSMITTER ANTENNA IS POINTED TOWARDS THE RECEIVER.
Inventors
- 👤 Jacques Cayzac
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:12
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/222; H04N5/28; H01; H01Q; H01Q25/00; H01Q25/001; H01Q3/00; H01Q3/24
Claims Analysis
Total Claims: 0
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References 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 |