Patent US3562671A successfully refreshed from Google Patents.
US3562671A
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US
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Pulse position modulation communications system including means for suppressing zero-modulation signal components
Assignee: NEC Corp
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Filing: 1968-04-02
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Granted: 1971-02-09
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Expires: 1988-04-02
Abstract
Abstract AN IMPROVED PULSE POSITION MODULATOR IS DESCRIBED WHEREIN SELECTED PULSES ORDINARILY REPRESENTATIVE OF THE ZERO SIGNAL LEVEL OF THE INFORMATION TO BE TRANSMITTED ARE DELETED. DELETION IS ACCOMPLISHED BY GENERATING A PULSE POSITION MODULATED SIGNAL REPRESENTATIVE OF THE INFORMATION SIGNAL AND HAVING A PRESELECTED PULSE REPETITION RATE, WITH SELECTED PORTIONS OF THE PULSES THEREFROM DELETED BY USE ANOTHER PULSE TRAIN OF THE SAME REPETITION RATE BUT DELAYED IN TIME BY AN AMOUNT CORRESPONDING TO THE POSITION OF THE PULSE TO BE DELETED.
Inventors
- 👤 Takamichi Honma
- 👤 Saburo Aoki
- 👤 Yasuhiro Toshitsuna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:05
CPC Classifications
H; H04; H04B; H04B14/00; H04B14/02; H04B14/026
Claims Analysis
Total Claims: 0
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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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |