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US3368211A
Expired / Lapsed
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Verification of nrzi recording
Assignee: AT&T Inc
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Filing: 1965-07-26
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Granted: 1968-02-06
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Expires: 1985-07-26
Abstract
No abstract record available.
Inventors
- 👤 Charles M Taris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:37
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/02; G11B5/127; G11B5/29
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
MAGNETIC TAPE RECORDING APPARATUS COMPRISING, IN COMBINATION: (A) A MAGNETIC GAP HAVING A SELECTED LENGTH DEFINED BY A LEADING EDGE AND A TRAILING EDGE; (B) A MAGNETIC TAPE ADVANCEABLE LENGTHWISE ACROSS SAID GAP; (C) MEANS RESPONSIVE TO RECEIPT OF EACH SUCCESSIVE BINARY BIT FOR PLACING A MAGNETIC FLUX ON SAID TAPE BETWEEN SAID LEADING AND TRAILING EDGES; AND (D) MEANS RESPONSIVE TO PLACING OF EACH SUCCESSIVE SAID FLUX FOR ADVANCING SAID TAPE ACROSS SAID GAP IN EQUAL STEPS, THE LENGTH OF EACH SAID STEP BEING FRACTIONALLY LESS THAN SAID MAGNETIC GAP LENGTH AND EACH SAID STEP ADVANCING THE FLUX LAST CREATED BENEATH
Claim 2
Dependent Claim
102 words
MAGNETIC TAPE RECORDING APPARATUS COMPRISING, IN COMBINATION: (A) A MAGNETIC GAP HAVING A SELECTED LENGTH DEFINED BY A LEADING EDGE AND A TRAILING EDGE; (B) A MAGNETIC TAPE ADVANCEABLE LENGTHWISE ACROSS SAID GAP; (C) MEANS RESPONSIVE TO RECEIPT OF EACH SUCCESSIVE BINARY BIT FOR PLACING A MAGNETIC FLUX ON SAID TAPE BETWEEN SAID LEADING AND TRAILING EDGES; AND (D) MEANS RESPONSIVE TO PLACING OF EACH SUCCESSIVE SAID FLUX FOR ADVANCING SAID TAPE ACROSS SAID GAP IN EQUAL STEPS, THE LENGTH OF EACH SAID STEP BEING FRACTIONALLY LESS THAN SAID MAGNETIC GAP LENGTH AND EACH SAID STEP ADVANCING THE FLUX LAST CREATED BENEATH
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) | 1971-02-05 | 1971-08-07 | 1972-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-05 | 1975-08-07 | 1976-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-05 | 1979-08-07 | 1980-02-06 | $7700.00 | Window Closed / Lapsed |