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US3564509A Expired / Lapsed US ⏱️ 0.0 years remaining

Data processing apparatus

Assignee: Unisys Corp
•
Filing: 1968-04-22
•
Granted: 1971-02-16
•
Expires: 1988-04-22
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Abstract

Abstract A DATA PROCESSING SYSTEM HAVING A MAIN DATA PROCESSOR AND A PLURALITY OF REMOTE TERMINALS EACH HAVING DATA PROCESSING CAPABILITY. THE MAIN OR CENTRAL PROCESSOR IS COUPLED IN A POLLING ENVIRONMANT TO THE VARIOUS TERMINAL PROCESSORS VIA A COMMUNICATION LINK. COMMUNICATION OR DATA TRANSMISSION OF EACH OF THE VARIOUS PERIPHERAL OR TERMINAL PROCESSORS TO AND FROM THE CENTRAL DATA PROCESSOR IS CONTROLLED BY SEPARATE LINE DISCIPLINE PROCESSORS. A LINE DISCIPLINE PROCESSOR IS COUPLED AND RESPONSIVE TO THE RESPECTIVE DATA PROCESSOR AT EACH REMOTE SITE. THE LINE DISCIPLINE PROCESSOR AT EACH REMOTE TERMINAL EDITS AND ASSEMBLES THE INFORMATION TO BE TRANSMITTED AND IDENTIFIES, EDITS AND ASSEMBLES INFORMATION RECEIVED AND PERFORMS OTHER TASKS RELATED TO THE COMMUNICATION FUNCTION THEREBY PROVIDING MICRO-PROGRAMMED LINE DISCIPLING.

Inventors

  • 👤 Cornelius C Perkins
  • 👤 John H Pedersen
  • 👤 Hoy Ying Chang
  • 👤 Michael M Malmer Jr

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-22 19:27
CPC Classifications
G; G06; G06F; G06F13/00; G06F13/14; G06F13/16; G06F13/18; G06F13/20; G06F13/22; G06F13/38; G06F13/382; G06F13/385; G06F15/00; G06F15/16

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) 1974-02-15 1974-08-17 1975-02-16 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1978-02-15 1978-08-17 1979-02-16 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1982-02-15 1982-08-17 1983-02-16 $7700.00 Window Closed / Lapsed

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