US3085203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compatible single-sideband transmission
Assignee: AT&T Inc
•
Filing: 1960-08-08
•
Granted: 1963-04-09
•
Expires: 1980-08-08
Abstract
No abstract record available.
Inventors
- 👤 Jr Benjamin F Logan
- 👤 Manfred R Schroeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:03
CPC Classifications
H; H03; H03C; H03C1/00; H03C1/52; H03C1/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
IN COMBINATION, APPARATUS FOR DEVELOPING AN ERROR CORRECTING MODULATING SIGNAL FOR A SINGLE-SIDEBAND GENERATOR COMPRISING A MESSAGE SIGNAL, MEANS FOR PRODUCING A FIRST SINGLE-SIDEBAND SIGNAL MODULATED IN ACCORDANCE WITH SAID MESSAGE SIGNAL, MEANS FOR GENERATING A SIGNAL PROPORTIONAL TO THE ENVELOPE OF SAID FIRST SINGLE-SIDEBAND SIGNAL, MEANS FOR SUBTRACTING SAID ENVELOPE SIGNAL FROM SAID MESSAGE SIGNAL TO PRODUCE A FIRST ERROR SIGNAL, MEANS FOR ALGEBRAICALLY COMBINING SAID ERROR SIGNAL WITH SAID ENVELOPE SIGNAL TO PRODUCE A FIRST MODULATING SIGNAL FOR PRODUCING IN SAID SINGLE-SIDEBAND GENERATOR A SIGNAL THAT YIELDS AFTER ENVELOPE DETECTION AND BAND-LIMITING SUBSTANTIALLY A REPLICA OF SAID MESSAGE SIGNAL, MEANS FOR BANDLIMITING SAID FIRST MODULATING SIGNAL, AND MEANS FOR UTILIZING SAID MODULATING SIGNAL TO PRODUCE A CARRIER SIGNAL AND ONE MODULATED SIDEBAND SIGNAL FOR TRANSMISSION.
Claim 2
Dependent Claim
127 words
IN COMBINATION, APPARATUS FOR DEVELOPING AN ERROR CORRECTING MODULATING SIGNAL FOR A SINGLE-SIDEBAND GENERATOR COMPRISING A MESSAGE SIGNAL, MEANS FOR PRODUCING A FIRST SINGLE-SIDEBAND SIGNAL MODULATED IN ACCORDANCE WITH SAID MESSAGE SIGNAL, MEANS FOR GENERATING A SIGNAL PROPORTIONAL TO THE ENVELOPE OF SAID FIRST SINGLE-SIDEBAND SIGNAL, MEANS FOR SUBTRACTING SAID ENVELOPE SIGNAL FROM SAID MESSAGE SIGNAL TO PRODUCE A FIRST ERROR SIGNAL, MEANS FOR ALGEBRAICALLY COMBINING SAID ERROR SIGNAL WITH SAID ENVELOPE SIGNAL TO PRODUCE A FIRST MODULATING SIGNAL FOR PRODUCING IN SAID SINGLE-SIDEBAND GENERATOR A SIGNAL THAT YIELDS AFTER ENVELOPE DETECTION AND BAND-LIMITING SUBSTANTIALLY A REPLICA OF SAID MESSAGE SIGNAL, MEANS FOR BANDLIMITING SAID FIRST MODULATING SIGNAL, AND MEANS FOR UTILIZING SAID MODULATING SIGNAL TO PRODUCE A CARRIER SIGNAL AND ONE MODULATED SIDEBAND SIGNAL FOR TRANSMISSION.
References Cited (Backward Citations)
US2777900A
Cited
US2849537A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-08 | 1966-10-08 | 1967-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-08 | 1970-10-08 | 1971-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-08 | 1974-10-08 | 1975-04-09 | $7700.00 | Window Closed / Lapsed |