US3423534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmission of supervisory information
Assignee: AT&T Inc
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Filing: 1963-11-21
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Granted: 1969-01-21
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Expires: 1983-11-21
Abstract
No abstract record available.
Inventors
- 👤 John W Pan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:38
CPC Classifications
H; H04; H04J; H04J3/00; H04J3/02; H04J3/08; H04J3/06; H04J3/0602; H04J3/0605; H04J3/07; H04J3/12; H04J3/125
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
126 words
APPARATUS COMPRISING A FIRST SOURCE OF INFORMATION HAVING A PLURALITY OF INFORMATION STATES, A SECOND SOURCE OF INFORMATION HAVING FIRST AND SECOND INFORMATION STATES, MEANS FOR GENERATING GROUPS OF CODE SIGNALS ACCORDING TO THE INFORMATION OF SAID FIRST SOURCE, EACH OF SAID PLURALITY OF INFORMATION STATES OF SAID SOURCE EXCEPT ONE BEING REPRESENTED BY A UNIQUELY CORRESPONDING GROUP OF CODE SIGNALS, MEANS FOR GENERATING A FIRST, PREASSIGNED, GROUP OF CODE SIGNALS CORRESPONDING TO SAID ONE INFORMATION STATE OF SAID FIRST INFORMATION SOURCE WHENEVER SAID SECOND INFORMATION SOURCE IS IN SAID FIRST INFORMATION STAGE, AND MEANS FOR GENERATING A SECOND, RESERVED, GROUP OF CODE SIGNALS CORRESPONDING TO SAID ONE INFORMATION STATE OF SAID FIRST INFORMATION SOURCE WHENEVER SAID SECOND INFORMATION SOURCE IS IN SAID SECOND INFORMATION STATE.
Claim 2
Dependent Claim
64 words
APPARATUS COMPRISING A TRANSMISSION PATH, MEANS FOR DETECTING A PRESCRIBED RANDOMLY-OCCURRING PERMUTATION OF SIGNALS ON SAID TRANSMISSION PATH, AND MEANS RESPONSIVE TO THE DETECTING MEANS FOR SIMULTANEOUSLY SUBSTITUTING FOR SAID PRESCRIBED PERMUTATION OF CODE SIGNALS A PERMUTATION OF CODE SIGNALS NOT NORMALLY OCCURRING ON SAID TRANSMISSION PATH AND INCREASING THE NUMBER OF SIGNALS ON SAID TRANSMISSION PATH BY ADDING SIGNALS TO SAID TRANSMISSION PATH.
Claim 3
Dependent Claim
46 words
BINARY APPARATUS COMPRISING A TRANSMISSION PATH, MEANS FOR DETECTING A PRESCRIBED RANDOMLY-OCCURRING PERMUTATION OF SIGNALS ON SAID TRANSMISSION PATH, AND MEANS RESPONSIVE TO THE DETECTING MEANS FOR ALTERING SAID PRESCRIBED PERMUTATION AND SIMULTANEOUSLY DELETING AT LEAST ONE SIGNAL ON SAID TRANSMISSION PATH REPRESENTING A BINARY "ONE."
Claim 4
Dependent Claim
95 words
IN A SYSTEM FOR COMMUNICATTING SIGNALS SELECTED FROM AN ALPHABET OF CODE SIGNALS, SAID ALPHABET COMPRISING A GROUP OF NORMALLY-OCCURRING PREASSIGNED SIGNALS AND A GROUP OF SIGNALS WHICH ARE NORMALLY PRECLUDED FROM APPEARING AT A TRANSMITTER OUTPUT, THE METHOD OF FRAMING CODE SIGNALS WHICH COMPRISES THE STEPS OF: (1) DETECTING A RANDOMLY-OCCURRING PREASSIGNED GROUP OF CODE SIGNALS, (2) REPLACING ONE OF THE DETECTED GROUPS OF SAID CODE SIGNALS BY A PRECLUDED GROUP OF CODE SIGNALS, AND (3) SIMULTANEOUSLY SUPPLEMENTING SAID PRECLUDED GROUP OF CODE SIGNALS BY ADDITIONAL CODE SIGNALS NOT NECESSARILY SELECTED FROM SAID ALPHABET.
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) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |