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US3588840A Expired / Lapsed US ⏱️ 0.0 years remaining

Method of block recording data on a magnetic tape

Assignee: NTT Inc
•
Filing: 1969-02-05
•
Granted: 1971-06-28
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Expires: 1989-02-05
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Abstract

Abstract A METHOD OF BLOCK RECORDING DATA ON A MAGNETIC TAPE COMPRISES (1) FEEDING DATA AT A SELECTED FIRST RATE TO A STORAGE UNIT UNTIL THERE HAS BEEN STORED A SELECTED AMOUNT LESS THAN DATA CONTAINED IN ONE BLOCK AND (2) FEEDING THE STORED DATA TO A RECORDING UNIT HAVING A TAPE TRANSPORT AT A SECOND SELECTED RATE WHICH IS FASTER THAN THE FIRST RATE WHILE CONTINUING TO FEED DATA TO THE STORAGE UNIT. THE RATES OF STORAGE AND RECORDING ARE SELECTED SO THAT THE DATA STORED IN THE STORAGE UNIT ARE EXHAUSTED SIMULTANEOUSLY WITH COMPLETION OF RECORDING OF ONE BLOCK OF DATA BY THE RECORDING UNIT. THE TAPE TRANSPORT OPERATES AT A CONTANT SPEED DURING BOTH PERIODS, THE LENGTH OF THE INTERRECORD GAP BETWEEN SUCCESSIVE BLOCKS BEING DETERMINED BY THE SELECTED STORAGE AND RECORDING RATES.

Inventors

  • 👤 Takuya Nomura
  • 👤 Yasuo Tada

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 09:12
CPC Classifications
G; G06; G06F; G06F5/00; G06F5/06; G06F5/10; G11; G11B; G11B20/00; G11B20/10; G06F2205/00; G06F2205/10; G06F2205/108

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) 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

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