US3226646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interfering radio signal cancelling bridge
Assignee: GEN ELECTRONIC LAB Inc
•
Filing: 1962-05-08
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Granted: 1965-12-28
•
Expires: 1982-05-08
Abstract
No abstract record available.
Inventors
- 👤 David R Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:42
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/06; H04B1/10; H04B1/12; H04B1/123
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
IN A BRIDGE TYPE SYSTEM FOR CANCELLING THE STRONGER OF TWO RADIO FREQUENCY SIGNALS, THE COMBINATION OF AN INTERFERENCE SIGNAL TRACKING FILTER MEANS IN THE PATH OF THE TWO RADIO FREQUENCY SIGNALS FOR ISOLATING THE STRONGER SIGNAL, A LINEAR GAIN AMPLIFIER IN THE PATH OF THE TOW RADIO FRQUENCY SIGNALS, AND SIGNAL SUBSTRACTING MEANS ARRANGED FOR SUBTRACTING THE OUTPUT OF THE TRACKING FILTER FROM THE OUTPUT OF THE AMPLIFIER.
Claim 2
Dependent Claim
69 words
IN A BRIDGE TYPE SYSTEM FOR CANCELLING THE STRONGER OF TWO RADIO FREQUENCY SIGNALS, THE COMBINATION OF AN INTERFERENCE SIGNAL TRACKING FILTER MEANS IN THE PATH OF THE TWO RADIO FREQUENCY SIGNALS FOR ISOLATING THE STRONGER SIGNAL, A LINEAR GAIN AMPLIFIER IN THE PATH OF THE TOW RADIO FRQUENCY SIGNALS, AND SIGNAL SUBSTRACTING MEANS ARRANGED FOR SUBTRACTING THE OUTPUT OF THE TRACKING FILTER FROM THE OUTPUT OF THE AMPLIFIER.
References Cited (Backward Citations)
US2923814A
Cited
US3092776A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-27 | 1969-06-28 | 1969-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-27 | 1973-06-28 | 1973-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-27 | 1977-06-28 | 1977-12-28 | $7700.00 | Window Closed / Lapsed |