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:
Apr. 16, 2013
Filed:
Apr. 29, 2008
Applicant:
Tom Judd, Carlsbad, CA (US);
Inventor:
Tom Judd, Carlsbad, CA (US);
Assignee:
Honeywell International Inc., Morristown, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01C 21/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Systems and methods are operable to determine that a navigation system has entered a structure. An exemplary embodiment monitors a magnetic field at an outdoor position, monitors a magnetic field at a current position, compares a characteristic of the monitored magnetic field at the current position with a corresponding characteristic of the outdoor magnetic field, and determines entry into the structure at least as a function of a change in the determined characteristic of the monitored magnetic field from the corresponding characteristic of the outdoor magnetic field.