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US3721773A Expired / Lapsed US ⏱️ 0.0 years remaining

Magnetic head transducer assembly for redundantly recording data on and reproducing data from dual-tracks of a magnetic recording medium

Assignee: Ampex Corp
•
Filing: 1970-10-09
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Granted: 1973-03-20
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Expires: 1990-10-09
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Abstract

Abstract A DATA PROCESSING METHOD AND SYSTEM FOR REDUNDANT RECORDING AND REPRODUCING OF DIGITAL OR OTHER FORMS OF DATA ON A MAGNETIC MEDIUM UTILIZING A SINGLE CHANNEL OF PROCESSING ELECTRONICS. IN RECORD, THE DATA IS FED THROUGH A SINGLE CHANNEL OF PROCESSING ELECTRONICS TO A PAIR OF TRANSDUCERS OF A HEAD ASSEMBLY WHEREAT THE SIGNAL IS DIVIDED TO CREATE TWO REDUNDANT TRACKS ON THE TAPE. IN PLAYBACK, THE REDUNDANT DATA IS SIMULTANEOUSLY REPRODUCED FROM DUAL TAPE TRACKS AND SUMMED TOGETHER DIRECTLY AT THE HEAD ASSEMBLY AND PROCESSED AS A SINGLE PLAYBACK SIGNAL BY A STANDARD SINGLE CHANNEL OF PROCESSING ELECTRONICS TO RECONSTITUTE THE ORIGINAL DATA WITH NEGLIGIBLE ERROR DUE TO TAPE DROPOUTS.

Inventors

  • 👤 G Kluge

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-24 16:07
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/78; H04N5/782; H04N5/91; H04N5/93; H04N5/94

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-03-19 1976-09-18 1977-03-20 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-03-19 1980-09-18 1981-03-20 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-03-19 1984-09-18 1985-03-20 $7700.00 Window Closed / Lapsed

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