US3369078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for transmitting stereophonic signals over electric power lines
Assignee: CHARLES R STRADLEY
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Filing: 1965-06-28
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Granted: 1968-02-13
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Expires: 1985-06-28
Abstract
No abstract record available.
Inventors
- 👤 Charles R Stradley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:44
CPC Classifications
H; H04; H04H; H04H20/00; H04H20/86; H04H20/88
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A COUPLING AND LOADING DEVICE FOR IMPRESSING STEREOPHONIC SIGNALS ON ELECTRIC POWER LINES WHICH COMPRISES A POWER SUPPLY CIRCUIT, FIRST AND SECOND AUDIO SIGNAL CHANNELS, MEANS FOR MODULATING THE FIRST CHANNEL ON A FIRST CARRIER WAVE AND THE SECOND CHANNEL ON A SECOND CARRIER WAVE, A POWER TRANSFORMER FOR SUPPLYING ENERGY FROM SAID POWER CIRCUIT TO SAID CHANNELS, OUTPUT TRANSFORMERS FOR SAID CHANNELS EACH HAVING A PRIMARY WINDING AND A SECONDARY WINDING, MEANS CONNECTING SAID SECONDARY WINDINGS OF SAID OUTPUT TRANSFORMERS IN SERIES WITH ONE ANOTHER AND WITH THE PRIMARY WINDING OF SAID POWER TRANSFORMER, AND MEANS FOR BYPASSING RADIO FREQUENCY ENERGY TO GROUND AROUND SAID POWER TRANSFORMER AT BOTH TERMINALS OF SAID POWER TRANSFORMER PRIMARY WINDING.
Claim 2
Dependent Claim
117 words
A COUPLING AND LOADING DEVICE FOR IMPRESSING STEREOPHONIC SIGNALS ON ELECTRIC POWER LINES WHICH COMPRISES A POWER SUPPLY CIRCUIT, FIRST AND SECOND AUDIO SIGNAL CHANNELS, MEANS FOR MODULATING THE FIRST CHANNEL ON A FIRST CARRIER WAVE AND THE SECOND CHANNEL ON A SECOND CARRIER WAVE, A POWER TRANSFORMER FOR SUPPLYING ENERGY FROM SAID POWER CIRCUIT TO SAID CHANNELS, OUTPUT TRANSFORMERS FOR SAID CHANNELS EACH HAVING A PRIMARY WINDING AND A SECONDARY WINDING, MEANS CONNECTING SAID SECONDARY WINDINGS OF SAID OUTPUT TRANSFORMERS IN SERIES WITH ONE ANOTHER AND WITH THE PRIMARY WINDING OF SAID POWER TRANSFORMER, AND MEANS FOR BYPASSING RADIO FREQUENCY ENERGY TO GROUND AROUND SAID POWER TRANSFORMER AT BOTH TERMINALS OF SAID POWER TRANSFORMER PRIMARY WINDING.
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) | 1971-02-12 | 1971-08-14 | 1972-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-12 | 1975-08-14 | 1976-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-12 | 1979-08-14 | 1980-02-13 | $7700.00 | Window Closed / Lapsed |