US3377583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable density magnetic binary recording and reproducing system
Assignee: Mohawk Data Sciences Corp
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Filing: 1964-10-08
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Granted: 1968-04-09
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Expires: 1984-10-08
Abstract
No abstract record available.
Inventors
- 👤 Jr John C Sims
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:05
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/14; G11B20/1403; G11B20/1423; G11B20/1426
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
IN COMBINATION WITH A SENSITIZED SURFACE, APPARATUS FOR RECORDING ON SAID SURFACE A TRAIN OF DATA SIGNALS, EACH OF WHICH OCCUPIES A SINGLE CELL AND MANIFESTS ONE OR THE OTHER OF TWO DISTINCT VALUES, WHICH COMPRISES, MEANS FOR INTERPOLATING IN SAID TRAIN AND IMMEDIATELY PREDEDING EACH GROUP OF N CONSECUTIVE DATA SIGNALS, N BEING AN INTEGER GREATER THAN ONE, A FRAMING SIGNAL HAVING A PRESELECTED ONE OF SAID TWO VALUES, THEREBY TO DEVELOP A MODIFIED TRAIN, AND MEANS FOR CONVERTING ALL SIGNALS OF SAID MODIFIED TRAIN THAT ARE OF SAID PRESELECTED VALUE INTO A TRANSITION BETWEEN TWO DISTINCT CONDITIONS OF SAID SURFACE, WHEREBY FRAMING SIGNALS ARE DISTINGUISHABLE FROM DATA SIGNALS BY VIRTUE OF THEIR REGULARITY AND DATA SIGNALS OF ONE VALUE ARE DISTINGUISHABLE FROM DATA SIGNALS OF THE OTHER VALUE BY VIRTUE OF THE SPACING ON SAID SURFACE BETWEEN CONSECUTIVE TRANSITIONS.
Claim 2
Dependent Claim
141 words
IN COMBINATION WITH A SENSITIZED SURFACE, APPARATUS FOR RECORDING ON SAID SURFACE A TRAIN OF DATA SIGNALS, EACH OF WHICH OCCUPIES A SINGLE CELL AND MANIFESTS ONE OR THE OTHER OF TWO DISTINCT VALUES, WHICH COMPRISES, MEANS FOR INTERPOLATING IN SAID TRAIN AND IMMEDIATELY PREDEDING EACH GROUP OF N CONSECUTIVE DATA SIGNALS, N BEING AN INTEGER GREATER THAN ONE, A FRAMING SIGNAL HAVING A PRESELECTED ONE OF SAID TWO VALUES, THEREBY TO DEVELOP A MODIFIED TRAIN, AND MEANS FOR CONVERTING ALL SIGNALS OF SAID MODIFIED TRAIN THAT ARE OF SAID PRESELECTED VALUE INTO A TRANSITION BETWEEN TWO DISTINCT CONDITIONS OF SAID SURFACE, WHEREBY FRAMING SIGNALS ARE DISTINGUISHABLE FROM DATA SIGNALS BY VIRTUE OF THEIR REGULARITY AND DATA SIGNALS OF ONE VALUE ARE DISTINGUISHABLE FROM DATA SIGNALS OF THE OTHER VALUE BY VIRTUE OF THE SPACING ON SAID SURFACE BETWEEN CONSECUTIVE TRANSITIONS.
References Cited (Backward Citations)
US3264623A
Cited
US3237176A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-09 | 1971-10-09 | 1972-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-09 | 1975-10-09 | 1976-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-09 | 1979-10-09 | 1980-04-09 | $7700.00 | Window Closed / Lapsed |