US3223925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital data modulation device
Assignee: International Business Machines Corp
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Filing: 1962-01-29
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Granted: 1965-12-14
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Expires: 1982-01-29
Abstract
No abstract record available.
Inventors
- 👤 Jr William A Florac
- 👤 Hans Y Juliusburger
- 👤 Arthur A Kusnick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:53
CPC Classifications
H; H04; H04L; H04L27/00; H04L27/10; H04L27/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
101 words
A MODULATION CIRCUIT COMPRISING: A PLURALITY OF WAVE GENERATORS EACH HAVING A DIFFERENT FREQUENCY OF OSCILLATION; A SOURCE OF DATA SIGNALS; FIRST MEANS COUPLED TO SAID SOURCE OF DATA SIGNALS AND SAID GENERATORS FOR SELECTING AND PASSING A PREDETERMINED OUTPUT WAVE OF ONLY ONE OF SAID GENERATORS; AND SECOND MEANS COUPLED TO RECEIVE THE SELECTED FREQUENCY WAVE FROM SAID FIRST MEANS AND COUPLED TO SAID SOURCE OF DATA SIGNALS,. SELECTIVELY OPERATIVE TO PASS THE ORIGINAL WAVE OR A PHASE SHIFTED WAVE OF THE SELECTED FREQUENCY WAVE AND PROVIDE AN OUTPUT WAVEFORM WHICH IS ALWAYS CONTINUOUS AND WITHOUT ABRUPT CHANGE IN SLOPE.
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) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |