Patent US3149323A successfully refreshed from Google Patents.
US3149323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Three-level binary code transmission
Assignee: AT&T Inc
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Filing: 1962-07-25
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Granted: 1964-09-15
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Expires: 1982-07-25
Abstract
No abstract record available.
Inventors
- 👤 Marvin R Aaron
- 👤 John S Mayo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:38
CPC Classifications
H; H04; H04L; H04L25/00; H04L25/38; H04L25/40; H04L25/49; H04L25/4917; H04L25/4923; H04L25/4925
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
182 words
APPARATUS FOR CONVERTING A TWO-VALUED BINARY CODE TRAIN OF ON AND OFF PULSES HAVING A BASIC PULSE REPETITION FREQUENCY AND A POWER DENSITY SPECTRUM WITH DISCRETE COMPONENTS AT ZERO FREQUENCY AND AT SAID BASIC PULSE REPETITION FREQUENCY AND WITH A SUBSTANTIAL CONTINUOUS COMPONENT AT BOTH ZERO FREQUENCY AND SAID BASIC PULSE REPETITION FREQUENCY, WHERE SAID ON AND OFF PULSES ARE RESPECTIVELY DIFFERENT ENERGY LEVELS AND ALL OF SAID ON PULSES HAVE THE SAME POLARITY WITH RESPECT TO SAID OFF PULSES, INTO A THREE-LAVUED PULSE TRAIN HAVING A POWER DENSITY SPECTRUM WITH NO DISCRETE COMPONENTS AND WITH A CONTINUOUS COMPONENT WHICH HAS NULLS AT ZERO FREQUENCY AND SAID BASIC PULSE REPETITION FREQUENCY AND ITS FIRST PEAK AT LESS THAN HALF SAID BASIC PULSE REPETITION FREQUENCY WHICH COMPRISES MEANS FOR SELECTING SUCCESSIVE GROUPS OF N CONSECUTIVE ON PULSES FROM SAID TWO-VALUED BINARY CODE TRAIN, WHERE N IS AN INTEGER GREATER THAN UNITY, AND MEANS FOR INVERTING WITH RESPECT TO THE OFF PULSES THE POLARITY OF ALL OF THE ON PULSES OF ALTERNATE ONES OF SAID SELECTED GROUPS WHILE LEAVING THE OFF PULSES SUBSTANTIALLY UNDISTURBED.
Claim 2
Dependent Claim
182 words
APPARATUS FOR CONVERTING A TWO-VALUED BINARY CODE TRAIN OF ON AND OFF PULSES HAVING A BASIC PULSE REPETITION FREQUENCY AND A POWER DENSITY SPECTRUM WITH DISCRETE COMPONENTS AT ZERO FREQUENCY AND AT SAID BASIC PULSE REPETITION FREQUENCY AND WITH A SUBSTANTIAL CONTINUOUS COMPONENT AT BOTH ZERO FREQUENCY AND SAID BASIC PULSE REPETITION FREQUENCY, WHERE SAID ON AND OFF PULSES ARE RESPECTIVELY DIFFERENT ENERGY LEVELS AND ALL OF SAID ON PULSES HAVE THE SAME POLARITY WITH RESPECT TO SAID OFF PULSES, INTO A THREE-LAVUED PULSE TRAIN HAVING A POWER DENSITY SPECTRUM WITH NO DISCRETE COMPONENTS AND WITH A CONTINUOUS COMPONENT WHICH HAS NULLS AT ZERO FREQUENCY AND SAID BASIC PULSE REPETITION FREQUENCY AND ITS FIRST PEAK AT LESS THAN HALF SAID BASIC PULSE REPETITION FREQUENCY WHICH COMPRISES MEANS FOR SELECTING SUCCESSIVE GROUPS OF N CONSECUTIVE ON PULSES FROM SAID TWO-VALUED BINARY CODE TRAIN, WHERE N IS AN INTEGER GREATER THAN UNITY, AND MEANS FOR INVERTING WITH RESPECT TO THE OFF PULSES THE POLARITY OF ALL OF THE ON PULSES OF ALTERNATE ONES OF SAID SELECTED GROUPS WHILE LEAVING THE OFF PULSES SUBSTANTIALLY UNDISTURBED.
References Cited (Backward Citations)
US2700696A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-15 | 1968-03-16 | 1968-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-15 | 1972-03-16 | 1972-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-15 | 1976-03-16 | 1976-09-15 | $7700.00 | Window Closed / Lapsed |