US3071727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bandwidth reduction system
Assignee: AT&T Inc
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Filing: 1961-05-08
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Granted: 1963-01-01
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Expires: 1981-05-08
Abstract
No abstract record available.
Inventors
- 👤 Sotirios C Kitsopoulos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:38
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/004; H03M1/005; H03M3/00; H03M3/04; H04; H04B; H04B1/00; H04B1/66; H04N; H04N19/00; H04N19/90; H03M1/12; H04N19/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A SYSTEM FOR THE PULSE-CODE TRANSMISSION OF MESSAGE SIGNALS COMPRISING A SOURCE OF MESSAGE SIGNALS, MEANS FOR AMPLING SAID SIGNALS, AND A TRANSMISSION MEDIUM; DIFFERENTIAL ENCODING MEANS INTERCONNECTING SAID SAMPLING MEANS AND SAID TRANSMISSION MEDIUM, FULL-AMPLITUDE ENCODING MEANS CONNECTED IN PARALLEL WITH SAID DIFFERENTIAL ENCODING MEANS AND ALSO INTERCONNECTING SAID SAMPLING MEANS AND SAID TRANSMISSION MEDIUM, COMPARATOR MEANS FOR PERIODICALLY DETERMINING THE RATE OF CHANGE OF SAID SIGNALS, AND MEANS SELECTIVELY ACTIVATING ONLY ONE OF SAID ENCODING MEANS IN ACCORDANCE WITH THE RATE-OF-CHANGE DETERMINATION OF SAID COMPARATOR MEANS.
Claim 2
Independent Claim
88 words
A SYSTEM FOR THE PULSE-CODE TRANSMISSION OF MESSAGE SIGNALS COMPRISING A SOURCE OF MESSAGE SIGNALS, MEANS FOR AMPLING SAID SIGNALS, AND A TRANSMISSION MEDIUM; DIFFERENTIAL ENCODING MEANS INTERCONNECTING SAID SAMPLING MEANS AND SAID TRANSMISSION MEDIUM, FULL-AMPLITUDE ENCODING MEANS CONNECTED IN PARALLEL WITH SAID DIFFERENTIAL ENCODING MEANS AND ALSO INTERCONNECTING SAID SAMPLING MEANS AND SAID TRANSMISSION MEDIUM, COMPARATOR MEANS FOR PERIODICALLY DETERMINING THE RATE OF CHANGE OF SAID SIGNALS, AND MEANS SELECTIVELY ACTIVATING ONLY ONE OF SAID ENCODING MEANS IN ACCORDANCE WITH THE RATE-OF-CHANGE DETERMINATION OF SAID COMPARATOR MEANS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-31 | 1966-07-02 | 1967-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-31 | 1970-07-02 | 1971-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-31 | 1974-07-02 | 1975-01-01 | $7700.00 | Window Closed / Lapsed |