Patent US3588348A successfully refreshed from Google Patents.
US3588348A
Expired / Lapsed
US
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System for generating fsk tones for data transmission
Assignee: General Dynamics Corp
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Filing: 1968-07-25
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Granted: 1971-06-28
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Expires: 1988-07-25
Abstract
Abstract A FSK TRANSMISSION SYSTEM IS DESCRIBED WHICH UTILIZES TWO CRYSTAL OSCILLATORS AND FREQUENCY DIVIDERS, TOGETHER WITH DIGITAL LOGIC RESPONSIVE TO THE CONDITION OF THE DIVIDER, AS WELL AS THE MODE OF TRANSMISSION DESIRED, TO PROVIDE SEVERAL TOTAL FREQUENCIES FOR THE TRANSMISSION OF DIFFERENT CHANNELS OF DIGITAL INFORMATION. THE SYSTEM HAS A PERFORMANCE COMPATIBLE WITH THE RECOMMENDATIONS PROMULGATED BY THE CIT FOR THE TRANSMISSION OF DIGITAL INFORMATION BY FSK TONES.
Inventors
- 👤 John C Bowling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:07
CPC Classifications
H; H04; H04L; H04L27/00; H04L27/10; H04L27/12; H04L27/122
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) | 1974-06-27 | 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 |