The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 28, 2014
Filed:
Mar. 28, 2008
Applicant:
James B. Shearer, Ossining, NY (US);
Inventor:
James B. Shearer, Ossining, NY (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
G06F 7/552 (2006.01); G06F 7/38 (2006.01);
U.S. Cl.
CPC ...
Abstract
Approximations of reciprocal square roots are provided in IEEE floating point binary format by obtaining an index from an input value, accessing a pair of table values and performing a limited number of simple and rapidly performed manipulations. The maximum relative error in the approximation thus provided is less than 0.75/2as compared with a maximum relative error of 1/2of known methods, where 2is the number of table entries.
Shearer, James. (2014). Method to compute an approximation to the reciprocal of the square root of a floating point number in ieee format (U.S. Patent No. 8639737). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8639737
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