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:
Sep. 28, 1993
Filed:
Jun. 20, 1991
Applicant:
Inventors:
Ashgar K Malik, Escondido, CA (US);
David C Lee, San Diego, CA (US);
Klaus G Dudda, deceased, late of Roseville, MN (US);
Assignee:
Unisys Corporation, Blue Bell, PA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365201 ; 36518901 ; 365218 ;
Abstract
A bookkeeping memory is disclosed in which a row-column matrix of storage cells are written by row and cleared by column, and output signals are generated that indicate which rows of cells are in a '0' state. Bookkeeping functions are performed extremely fast by correlating one set of items to the rows, correlating a related set of items to the columns, and performing row write/column clear/zero row detect operations in the memory.