US3588349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Demodulation apparatus of a phase-modulated telegraphic wave or waves
Assignee: KDDI Corp
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Filing: 1968-12-09
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Granted: 1971-06-28
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Expires: 1988-12-09
Abstract
Abstract AN APPARATUS FOR DEMODULATING AT LEAST ONE PHASE-MODULATED TELEGRAPHIC WAVE BY COMPARING THE PHASE POSITION OF THE TELEGRAPHIC WAVE WITH THE PHASE POSITION OF AT LEAST ONE REFERENCE PHASE WAVE, WHERE THE PHASE-MODULATED TELEGRAPHIC WAVE IS SAMPLED AND CODED TO DIGITAL SIGNALS OF QUANTIZED CODE CONFIGURATION SO THAT DEMODULATION OF THE PHASE- MODULATED TELEGRAPHIC WAVE IS PERFORMED BY REPEATELY ACCUMULATING, FOR THE DURATION OF EACH SIGNAL ELEMENT OF THE PHASE-MODULATED WAVE, COMPARISON RESULTS BETWEEN THE CODED DIGITAL SIGNALS AND THE REFERENCE PHASE WAVE.
Inventors
- 👤 Kazuo Kawai
- 👤 Hidetaka Yanagidaira
- 👤 Sotokichi Shintani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:18
CPC Classifications
H; H04; H04L; H04L27/00; H04L27/18; H04L27/22; H04L27/233; H04L27/2338
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |