Patent US2848167A successfully refreshed from Google Patents.
Patent US3320531A successfully refreshed from Google Patents.
US3320531A
Expired / Lapsed
US
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Adjustable marker generator for spectrum analyzers
Assignee: Singer Co
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Filing: 1963-03-13
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Granted: 1967-05-16
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Expires: 1983-03-13
Abstract
No abstract record available.
Inventors
- 👤 William I L Wu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:58
CPC Classifications
G; G01; G01R; G01R13/00; G01R13/20; G01R13/22; G01R13/30
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
68 words
IN A SYSTEM FOR MEASURING FREQUENCY, MEANS FOR VISUALLY PLOTTING THE POSITION OF A KNOWN FREQUENCY AGAINST A FIRST FREQUENCY REPRESENTATIVE BASE LINE, MEANS FOR VISUALLY PLOTTING THE POSITION OF AN UNKNOWN FREQUENCY AGAINST A SECOND FREQUENCY REPRESENTATIVE BASE LINE, MEANS FOR RELATIVELY ADJUSTING SAID BASE LINES RELATIVE TO ONE ANOTHER AUTOMATICALLY IN ALTERNATION TO EFFECT A SIMULTANEOUS VISUAL COINCIDENCE OF SAID PLOTS, AND MEANS FOR INDICATING THE
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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) | 1970-05-15 | 1970-11-14 | 1971-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-15 | 1974-11-14 | 1975-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-15 | 1978-11-14 | 1979-05-16 | $7700.00 | Window Closed / Lapsed |