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.

Date of Patent:
Oct. 30, 2007

Filed:

Nov. 12, 2005
Applicants:

Richard J. Nelson, Brookline, NH (US);

James E. Murguia, Hollis, NH (US);

Inventors:

Richard J. Nelson, Brookline, NH (US);

James E. Murguia, Hollis, NH (US);

Assignee:
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G01C 3/08 (2006.01); G01C 1/00 (2006.01); G01N 21/00 (2006.01);
U.S. Cl.
CPC ...
Abstract

A system and method for determining whether the distance between an electromagnetic-energy emitting source and a predetermined location increased, decreased or remained constant between first and second times relies upon the selection of first and second energy bands whose average wavelengths are disparately absorbed as a function of transmission distance. Energy values corresponding to the intensity of detectable energy within each of the first and second sub-ranges at each of the first and second times are assigned. First and second ratios comparatively indicative of the intensity of energy detected, as represented by the assigned relative-energy values, within the first and second sub-ranges at each of the first and second times are computed and, based on a ratio-comparative analysis of the first and second ratios, a determination as to a direction of change in transmission distance is rendered by reference to modeled data associating, directly or indirectly, expected ratio-comparative relationships with an increase, decrease and lack of change in distance.


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