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. 30, 1997
Filed:
Sep. 09, 1994
Christian Lenz Cesar, Shrub Oak, NY (US);
Shun Shing Chan, Flushing, NY (US);
Thomas Anthony Cofino, Rye, NY (US);
Kenneth Alan Goldman, Norwalk, CT (US);
Sharon L Greene, Mt. Kisco, NY (US);
Harley Kent Heinrich, Brewster, NY (US);
Kevin Patrick McAuliffe, Peekskill, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A system and method is disclosed for selecting certain subgroups of radio frequency (RF) tags for querying, communicating, and/or identifying by a base station. The base station sends commands to a group tags within a RF field of the base station. The tags use control logic to determine whether or not they meet certain criteria sent out by the commands. This may cause the tags to change state which either prevents or allows a given tag to participate in an identification process. In this way, a given subgroup(s) of tags meeting certain criteria can be selected for querying, communicating, and/or identifying.