US3309464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stereophonic receiver having crosstalk compensation means
Assignee: Lanteris Space LLC
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Filing: 1964-01-03
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Granted: 1967-03-14
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Expires: 1984-01-03
Abstract
No abstract record available.
Inventors
- 👤 John P Pietrolewicz
- 👤 Hopengarten Abram
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:17
CPC Classifications
H; H03; H03D; H03D1/00; H03D1/22; H03D1/2209; H03D1/2218
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
IN A RADIO RECEIVER ADAPTED TO RECEIVE A COMPOSITE STEREOPHONIC SIGNAL INCLUDING A PHASE REFERENCE SIGNAL AND STEREOPHONIC SIGNALS CAPABLE OF BEING DERIVED BY SAMPLING OF SAID COMPOSITE SIGNAL UNDER CONTROL OF SAID PHASE REFERENCE SIGNAL, A SAMPLING BRIDGE CIRCUIT, MEANS FOR SUPPLYING SAID COMPOSITE SIGNAL TO SAID CIRCUIT, MEANS RESPONSIVE TO SAID PHASE REFERENCE SIGNAL AND INCLUDING A TRANSFORMER HAVING A CENTER-TAPPED SECONDARY WINDING CONNECTED TO SAID CIRCUIT FOR SUPPLYING SAMPLING VOLTAGES THERETO, STEREO OUTPUT CHANNELS EXTENDING FROM SAID CIRCUIT IN WHICH THERE TENDS TO BE UNDESIRED CROSS-TALK, MEANS FOR DERIVING A CROSS-TALK CORRECTION SIGNAL FROM SAID COMPOSITE SIGNAL, AND MEANS FOR SUPPLYING SAID CORRECTION SIGNAL TO THE CENTER-TAP OF SAID WINDING AND THENCE TO SAID CIRCUIT TO CANCEL THE UNDESIRED CROSS-TALK.
Claim 2
Dependent Claim
123 words
IN A RADIO RECEIVER ADAPTED TO RECEIVE A COMPOSITE STEREOPHONIC SIGNAL INCLUDING A PHASE REFERENCE SIGNAL AND STEREOPHONIC SIGNALS CAPABLE OF BEING DERIVED BY SAMPLING OF SAID COMPOSITE SIGNAL UNDER CONTROL OF SAID PHASE REFERENCE SIGNAL, A SAMPLING BRIDGE CIRCUIT, MEANS FOR SUPPLYING SAID COMPOSITE SIGNAL TO SAID CIRCUIT, MEANS RESPONSIVE TO SAID PHASE REFERENCE SIGNAL AND INCLUDING A TRANSFORMER HAVING A CENTER-TAPPED SECONDARY WINDING CONNECTED TO SAID CIRCUIT FOR SUPPLYING SAMPLING VOLTAGES THERETO, STEREO OUTPUT CHANNELS EXTENDING FROM SAID CIRCUIT IN WHICH THERE TENDS TO BE UNDESIRED CROSS-TALK, MEANS FOR DERIVING A CROSS-TALK CORRECTION SIGNAL FROM SAID COMPOSITE SIGNAL, AND MEANS FOR SUPPLYING SAID CORRECTION SIGNAL TO THE CENTER-TAP OF SAID WINDING AND THENCE TO SAID CIRCUIT TO CANCEL THE UNDESIRED CROSS-TALK.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |