US3311442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse transmission system employing quadrature modulation and direct current suppression
Assignee: US Philips Corp
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Filing: 1963-02-05
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Granted: 1967-03-28
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Expires: 1983-02-05
Abstract
No abstract record available.
Inventors
- 👤 Jager Frank De
- 👤 Petrus Josephus Van Gerwen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:36
CPC Classifications
H; H04; H04L; H04L5/00; H04L5/02; H04L5/12; H04B; H04B1/00; H04B1/68; H04B14/00; H04B14/02; H04L25/00; H04L25/02; H04L25/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
A PULSE TRANSMISSION SYSTEM COMPRISING A TRANSMITTER, A RECEIVER, AND A TRANSMISSION PATH BETWEEN SAID TRANSMITTER AND RECEIVER, SAID TRANSMITTER COMPRISING A SOURCE OF FIRST AND SECOND PULSE SIGNALS, FIRST AND SECOND TRANSMITTER CHANNELS, MEANS APPLYING SAID FIRST AND SECOND SIGNALS TO SAID FIRST AND SECOND TRANSMITTER CHANNELS RESPECTIVELY, AT LEAST ONE OF SAID CHANNELS INCLUDING MEANS FOR SUPPRESSING THE DIRECT CURRENT COMPONENT OF SIGNALS IN SAID ONE CHANNEL, A SOURCE OF COMMON CARRIER OSCILLATIONS, FIRST AND SECOND MODULATOR MEANS FOR MODULATING SAID CARRIER OSCILLATIONS WITH THE SIGNALS OF SAID FIRST AND SECOND CHANNELS RESPECTIVELY WITH A MUTUAL PHASE DISPLACEMENT OF 90*, MEANS PROVIDING PILOT OSCILLATIONS OF THE FREQUENCY OF SAID CARRIER OSCILLATIONS, AND MEANS APPLYING SAID PILOT OSCILLATIONS AND THE OUTPUTS OF SAID FIRST AND SECOND MODULATOR MEANS TO SAID TRANSMISSION PATH; SAID RECEIVER COMPRISING FIRST AND SECOND RECEIVING CHANNELS, EACH OF SAID RECEIVING CHANNELS
Claim 2
Dependent Claim
146 words
A PULSE TRANSMISSION SYSTEM COMPRISING A TRANSMITTER, A RECEIVER, AND A TRANSMISSION PATH BETWEEN SAID TRANSMITTER AND RECEIVER, SAID TRANSMITTER COMPRISING A SOURCE OF FIRST AND SECOND PULSE SIGNALS, FIRST AND SECOND TRANSMITTER CHANNELS, MEANS APPLYING SAID FIRST AND SECOND SIGNALS TO SAID FIRST AND SECOND TRANSMITTER CHANNELS RESPECTIVELY, AT LEAST ONE OF SAID CHANNELS INCLUDING MEANS FOR SUPPRESSING THE DIRECT CURRENT COMPONENT OF SIGNALS IN SAID ONE CHANNEL, A SOURCE OF COMMON CARRIER OSCILLATIONS, FIRST AND SECOND MODULATOR MEANS FOR MODULATING SAID CARRIER OSCILLATIONS WITH THE SIGNALS OF SAID FIRST AND SECOND CHANNELS RESPECTIVELY WITH A MUTUAL PHASE DISPLACEMENT OF 90*, MEANS PROVIDING PILOT OSCILLATIONS OF THE FREQUENCY OF SAID CARRIER OSCILLATIONS, AND MEANS APPLYING SAID PILOT OSCILLATIONS AND THE OUTPUTS OF SAID FIRST AND SECOND MODULATOR MEANS TO SAID TRANSMISSION PATH; SAID RECEIVER COMPRISING FIRST AND SECOND RECEIVING CHANNELS, EACH OF SAID RECEIVING CHANNELS
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) | 1970-03-27 | 1970-09-26 | 1971-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-27 | 1974-09-26 | 1975-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-27 | 1978-09-26 | 1979-03-28 | $7700.00 | Window Closed / Lapsed |