Patent UST910002I4 successfully refreshed from Google Patents.
Patent US3209261A successfully refreshed from Google Patents.
US3209261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmission systems
Assignee: International Business Machines Corp
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Filing: 1962-12-18
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Granted: 1965-09-28
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Expires: 1982-12-18
Abstract
No abstract record available.
Inventors
- 👤 Dale L Critchlow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:17
CPC Classifications
H; H04; H04L; H04L5/00; H04L5/02; H04L5/04; G; G06; G06F; G06F13/00; G06F13/38; H04J; H04J99/00; H04L7/00; H04L7/02; H04L7/027
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A SYSTEM FOR TRANSMITTING DIGITAL DATA SIGNALS HAVING TRANSITIONS THEREBETWEEN COMPRISING (A) MEANS FOR TRANSMITTING SAID DIGITAL DATA SIGNALS AND (B) A RECEIVER FOR RECEIVING SAID SIGNALS INCLUDING (C) A DEMODULATOR, (D) A UTILIZATION DEVICE, (E) A ZERO THRESHOLD DETECTOR COUPLING SAID DEMODULATOR TO SAID UTILIZATION DEVICE, (F) A FIRST DIFFERNTIATOR COUPLED TO THE OUTPUT OF SAID DEMODULATOR, (G) A SECOND DIFFERNTIATOR COUPLED TO THE OUTPUT OF SAID ZERO THRESHOLD DETECTOR, (H) A SUMMING NETWORK, THE OUTPUTS OF SAID FIRST AND SECOND DIFFERENTIATORS BEING COUPLED TO SAID SUMMING NETWORK, (I) A TUNED CIRCUIT COUPLED TO THE OUTPUT OF SAID SUMMING NETWORK AND (J) MEANS FOR COUPLING SAID TUNED CIRCUIT TO SAID UTILIZATION DEVICE.
Claim 2
Independent Claim
113 words
A SYSTEM FOR TRANSMITTING DIGITAL DATA SIGNALS HAVING TRANSITIONS THEREBETWEEN COMPRISING (A) MEANS FOR TRANSMITTING SAID DIGITAL DATA SIGNALS AND (B) A RECEIVER FOR RECEIVING SAID SIGNALS INCLUDING (C) A DEMODULATOR, (D) A UTILIZATION DEVICE, (E) A ZERO THRESHOLD DETECTOR COUPLING SAID DEMODULATOR TO SAID UTILIZATION DEVICE, (F) A FIRST DIFFERNTIATOR COUPLED TO THE OUTPUT OF SAID DEMODULATOR, (G) A SECOND DIFFERNTIATOR COUPLED TO THE OUTPUT OF SAID ZERO THRESHOLD DETECTOR, (H) A SUMMING NETWORK, THE OUTPUTS OF SAID FIRST AND SECOND DIFFERENTIATORS BEING COUPLED TO SAID SUMMING NETWORK, (I) A TUNED CIRCUIT COUPLED TO THE OUTPUT OF SAID SUMMING NETWORK AND (J) MEANS FOR COUPLING SAID TUNED CIRCUIT TO SAID UTILIZATION DEVICE.
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) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |