US3214749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Three-level binary code transmission
Assignee: AT&T Inc
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Filing: 1959-11-23
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Granted: 1965-10-26
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Expires: 1979-11-23
Abstract
No abstract record available.
Inventors
- 👤 Karnaugh Maurice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:21
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
186 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-VALUED PULSE TRAIN HAVING A POWER DENSITY SPECTRUM WITH NO DISCRETE COMPONENTS AND WITH A CONTINUOUS COMPONENT WHICH HAS NULLS AT ZERO FREQUENCY, SAID BASIC PULSE REPETITION FREQUENCY, AND HALF SAID BASIC PULSE REPETITION FREQUENCY WHICH COMPRISES A PAIR OF SEPARATE CONVERSION CHANNELS, MEANS FOR ROUTING CONSECUTIVE PULSES OF SAID TWO-VALUED BINARY CODE TRAIN INTO ALTERNATE ONES OF SAID CONVERSION CHANNELS IN SEQUENCE, MEANS FOR INVERTING WITH RESPECT TO THE OFF PULSES THE POLARITY OF ALTERNATE ON PULSES IN EACH OF SAID CHANNELS WHILE LEAVING THE OFF PULSES SUBSTANTIALLY UNDISTURBED, AND MEANS FOR COMBINING PULSES FROM BOTH OF SAID CHANNELS IN THEIR ORIGINAL SEQUENCE.
Claim 2
Dependent Claim
186 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-VALUED PULSE TRAIN HAVING A POWER DENSITY SPECTRUM WITH NO DISCRETE COMPONENTS AND WITH A CONTINUOUS COMPONENT WHICH HAS NULLS AT ZERO FREQUENCY, SAID BASIC PULSE REPETITION FREQUENCY, AND HALF SAID BASIC PULSE REPETITION FREQUENCY WHICH COMPRISES A PAIR OF SEPARATE CONVERSION CHANNELS, MEANS FOR ROUTING CONSECUTIVE PULSES OF SAID TWO-VALUED BINARY CODE TRAIN INTO ALTERNATE ONES OF SAID CONVERSION CHANNELS IN SEQUENCE, MEANS FOR INVERTING WITH RESPECT TO THE OFF PULSES THE POLARITY OF ALTERNATE ON PULSES IN EACH OF SAID CHANNELS WHILE LEAVING THE OFF PULSES SUBSTANTIALLY UNDISTURBED, AND MEANS FOR COMBINING PULSES FROM BOTH OF SAID CHANNELS IN THEIR ORIGINAL SEQUENCE.
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) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |