Patent US1923414A successfully refreshed from Google Patents.
US3277430A
Expired / Lapsed
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Independent direction reference system
Assignee: Individual
•
Filing: 1964-07-31
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Granted: 1966-10-04
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Expires: 1984-07-31
Abstract
No abstract record available.
Inventors
- 👤 Hagemann Marie
- 👤 David H Brunk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:10
CPC Classifications
G; G01; G01S; G01S15/00; G01S15/02; G01S15/50; G01S15/58; G01S15/60
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
75 words
A DOPPLER SYSTEM FOR DETERMINING THE MAGNITUDE OF ANY CHANGE IN HEADING OF A MOBILE CRAFT RELATIVE TO GROUND INCLUDING, CONTINUOUS WAVE DOPPLER MEANS FOR DERIVING SEPARATE ELECTRIC SIGNALS CORRESPONDING TO THE SPEEDS IN THE DIRECTION AT RIGHT ANGLES TO THE CRAFT''S HEADING OF FIRST AND SECOND LONGITUDINALLY SPACED LOCATIONS ON SAID CRAFT, AND MEANS OPERATIVE IN RESPONSE TO SAID ELECTRIC SIGNALS FOR PROVIDING A PHYSICAL MANIFESTATION REPRESENTATIVE OF CHANGES IN HEADING OF SAID CRAFT.
References Cited (Backward Citations)
US3065463A
Cited
US3095562A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |