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:
May. 15, 2007
Filed:
Jul. 23, 2003
Applicants:
Richard Fletcher, Cambridge, MA (US);
Olufemi Omojola, Dorchester, MA (US);
Inventors:
Richard Fletcher, Cambridge, MA (US);
Olufemi Omojola, Dorchester, MA (US);
Assignee:
Massachusetts Institute of Technology, Cambridge, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 19/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Methods and apparatus for counting or measuring the relative positions of a number of resonant tag elements in proximity to each other. By measuring the resonant frequency of a given set of tags using a reader antenna and comparing the measured frequency to a reference resonant frequency, the observed frequency shift is used to ascertain certain properties of the set of tags, such as the number of tags present or the relative positions thereof.