US3152305A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bipolar binary digital data vestigial sideband system
Assignee: AT&T Inc
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Filing: 1961-06-16
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Granted: 1964-10-06
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Expires: 1981-06-16
Abstract
No abstract record available.
Inventors
- 👤 Floyd K Becker
- 👤 James R Davey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:45
CPC Classifications
H; H04; H04L; H04L27/00; H04L27/02; H04B; H04B1/00; H04B1/68
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A VESTIGIAL SIDEBAND TRANSMISSION CIRCUIT COMPRISING A MESSAGE SIGNAL SOURCE, MEANS FOR SUPPRESSING LOW FREQUENCY COMPONENTS IN SAID MESSAGE SIGNAL, A CARRIER WAVE SOURCE, MEANS FOR PRODUCT MODULATING SAID CARRIER WAVE AND THE OUTPUT OF SAID SUPPRESSING MEANS TO FORM A DOUBLE-SIDEBAND, AMPLITUDE-MODULATED SUPPRESSEDCARRIER SIGNAL WAVE, MEANS FOR INSERTING AN UNMODULATED QUADRATURE COMPONENT OF SAID CARRIER WAVE INTO THE OUTPUT OF SAID MODULATING MEANS IN THE FREQUENCY SPACE LEFT FROM THE OPERATION OF SAID SUPPRESSING MEANS ON SAID MESSAGE SIGNAL, AND MEANS FOR REMOVING ALL BUT A VESTIGE OF ONE OF THE SIDEBANDS IN THE OUTPUT OF SAID MODULATING MEANS.
Claim 2
Dependent Claim
100 words
A VESTIGIAL SIDEBAND TRANSMISSION CIRCUIT COMPRISING A MESSAGE SIGNAL SOURCE, MEANS FOR SUPPRESSING LOW FREQUENCY COMPONENTS IN SAID MESSAGE SIGNAL, A CARRIER WAVE SOURCE, MEANS FOR PRODUCT MODULATING SAID CARRIER WAVE AND THE OUTPUT OF SAID SUPPRESSING MEANS TO FORM A DOUBLE-SIDEBAND, AMPLITUDE-MODULATED SUPPRESSEDCARRIER SIGNAL WAVE, MEANS FOR INSERTING AN UNMODULATED QUADRATURE COMPONENT OF SAID CARRIER WAVE INTO THE OUTPUT OF SAID MODULATING MEANS IN THE FREQUENCY SPACE LEFT FROM THE OPERATION OF SAID SUPPRESSING MEANS ON SAID MESSAGE SIGNAL, AND MEANS FOR REMOVING ALL BUT A VESTIGE OF ONE OF THE SIDEBANDS IN THE OUTPUT OF SAID MODULATING MEANS.
References Cited (Backward Citations)
US2604533A
Cited
US3007005A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-06 | 1968-04-06 | 1968-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-06 | 1972-04-06 | 1972-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-06 | 1976-04-06 | 1976-10-06 | $7700.00 | Window Closed / Lapsed |