Patent US3139615A successfully refreshed from Google Patents.
US3139615A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Three-level binary code transmission
Assignee: AT&T Inc
•
Filing: 1962-07-25
•
Granted: 1964-06-30
•
Expires: 1982-07-25
Abstract
No abstract record available.
Inventors
- 👤 Marvin R Aaron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:50
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
196 words
A SYSTEM IN WHICH A TWO-VALUED BINARY CODE TRAIN OF ON AND OFF PULSES EACH OCCUPYING ONE OF A REGULARLY SPACED SUCCESSION OF TIME SLOTS IS TRANSMITTED IN THE FORM OF A THREE-VALUED PULSE TRAIN HAVING AN ALTERED POWER DENSITY SPECTRUM WITH NULLS NOT ONLY AT ZERO FREQUENCY AND THE BASIC PULSE REPETITION FREQUENCY OF SAID BINARY CODE TRAIN BUT ALSO AT AT LEAST ONE INTERMEDIATE FREQUENCY WHICH COMPRISE, AT A TRANSMITTING STATION, MEANS FOR DELAYING SAID BINARY CODE TRAIN N TIME SLOTS, WHERE N IS AN INTEGER GREATER THAN UNITY, AND MEANS FOR SUBSTRACTING THE DELAYED PULSE TRAIN FROM THE ORIGINAL BINARY CODE TRAIN AND, AT A RECEIVING STATION, N RECEIVING CHANNELS, MEANS FOR ROUTING THE CONTENTS OF SUCCESSIVE TIME SLOTS OF THE RECEIVED PULSE TRAIN INTO SUCCESSIVELY DIFFERENT RECEIVING CHANNELS IN SEQUENCE, MEANS FOR GENERATING AN ON PULSE EVERY NTH TIME SLOT IN EACH OF SAID RECEIVING CHANNELS IN RESPONSE TO A RECEIVED ON PULSE OF ONE POLARITY UNTIL THE RECEIPT OF AN ON PULSE OF THE OPPOSITE POLARITY, AND MEANS FOR COMBINING GENERATED ON PULSES FROM ALL OF SAID RECEIVING CHANNELS IN THEIR ORIGINAL SEQUENCE TO REFORM SAID ORIGINAL TWO-VALUED BINARY CODE TRAIN.
Claim 2
Independent Claim
196 words
A SYSTEM IN WHICH A TWO-VALUED BINARY CODE TRAIN OF ON AND OFF PULSES EACH OCCUPYING ONE OF A REGULARLY SPACED SUCCESSION OF TIME SLOTS IS TRANSMITTED IN THE FORM OF A THREE-VALUED PULSE TRAIN HAVING AN ALTERED POWER DENSITY SPECTRUM WITH NULLS NOT ONLY AT ZERO FREQUENCY AND THE BASIC PULSE REPETITION FREQUENCY OF SAID BINARY CODE TRAIN BUT ALSO AT AT LEAST ONE INTERMEDIATE FREQUENCY WHICH COMPRISE, AT A TRANSMITTING STATION, MEANS FOR DELAYING SAID BINARY CODE TRAIN N TIME SLOTS, WHERE N IS AN INTEGER GREATER THAN UNITY, AND MEANS FOR SUBSTRACTING THE DELAYED PULSE TRAIN FROM THE ORIGINAL BINARY CODE TRAIN AND, AT A RECEIVING STATION, N RECEIVING CHANNELS, MEANS FOR ROUTING THE CONTENTS OF SUCCESSIVE TIME SLOTS OF THE RECEIVED PULSE TRAIN INTO SUCCESSIVELY DIFFERENT RECEIVING CHANNELS IN SEQUENCE, MEANS FOR GENERATING AN ON PULSE EVERY NTH TIME SLOT IN EACH OF SAID RECEIVING CHANNELS IN RESPONSE TO A RECEIVED ON PULSE OF ONE POLARITY UNTIL THE RECEIPT OF AN ON PULSE OF THE OPPOSITE POLARITY, AND MEANS FOR COMBINING GENERATED ON PULSES FROM ALL OF SAID RECEIVING CHANNELS IN THEIR ORIGINAL SEQUENCE TO REFORM SAID ORIGINAL TWO-VALUED BINARY CODE TRAIN.
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) | 1967-06-30 | 1967-12-30 | 1968-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-30 | 1971-12-30 | 1972-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-30 | 1975-12-30 | 1976-06-30 | $7700.00 | Window Closed / Lapsed |