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US3385960A Expired / Lapsed US ⏱️ 0.0 years remaining

Electronic ratio calculator performing aligning and subtraction operations

Assignee: Revvity Health Sciences Inc
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Filing: 1964-04-13
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Granted: 1968-05-28
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Expires: 1984-04-13
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Abstract

No abstract record available.

Inventors

  • 👤 Steve M Buu

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-26 03:25
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/38; G06F7/48; G06F7/57

Claims Analysis

Total Claims: 1
Claim 1
Independent Claim 177 words
IN A SYSTEM FOR PERFORMING A DIVIDING OPERATION, THE COMBINATION WHICH COMPRISES, A DIVIDEND REGISTER, A DIVISOR REGISTER, MEANS FOR STORING DATA REPRESENTATIVE OF DESIRED NUMBERS IN THE REGISTERS, ALIGNING MEANS RENDERED OPERATIVE IN RESPONSE TO THE STORAGE OF DATA IN THE REGISTERS FOR DIGITALLY SHIFTING THE DIVISOR DATA TO THE LEFT TO THE LAST POSITION AT WHICH THE DIVIDEND HAS A GREATER VALUE THAN THE DIVISOR, AND DIVIDING MEANS RENDERED OPERATIVE IN RESPONSE TO THE COMPLETION OF OPERATION OF THE ALIGNING MEANS FOR (1) REPEATEDLY SUBTRACTING THE DIVISOR FROM THE DIVIDEN UNTIL A NEGATIVE ANSWER IS PRODUCED, (2) RESTORING THE DIVIDEND TO ITS VALUE PRIOR TO THE LAST SUBTRACTING OPERATION AND DIGITALLY SHIFTING THE DIVISOR ONE DIGIT TO THE RIGHT WHEN A NEGATIVE ANSWER IS PRODUCED, AND (3) REPEATING THE SUBTRACTING, RESTORING AND SHIFTING OPERATIONS UNTIL THE DIVISOR IS RESTORED TO ITS INITIAL POSITION AND A NEGATIVE ANSWER IS PRODUCED, THE NUMBER OF SUBTRACTING OPERATION OF A NEGATIVE ANSWER BEING REPRESENTATIVE OF PRODUCTION OF A NEGATIVE ANSWER BEING REPRESENTATIVE OF A SUCCEEDING DIGIT OF THE QUOTIENT.

References Cited (Backward Citations)

US2947475A Cited
US3120606A Cited
US2932450A Cited
US2905821A Cited
US2961159A Cited
US3009062A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1971-05-28 1971-11-27 1972-05-28 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1975-05-28 1975-11-27 1976-05-28 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1979-05-28 1979-11-27 1980-05-28 $7700.00 Window Closed / Lapsed

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