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. 27, 2011
Filed:
Jun. 18, 2009
Guenter W. Brune, Bellevue, WA (US);
Peter H. Hambling, Bellevue, WA (US);
John E. Mercer, Kent, WA (US);
Lloyd A. Moore, Renton, WA (US);
Shiu S. NG, Kirkland, WA (US);
Rudolf Zeller, Seattle, WA (US);
Guenter W. Brune, Bellevue, WA (US);
Peter H. Hambling, Bellevue, WA (US);
John E. Mercer, Kent, WA (US);
Lloyd A. Moore, Renton, WA (US);
Shiu S. Ng, Kirkland, WA (US);
Rudolf Zeller, Seattle, WA (US);
Merlin Technology, Inc., Renton, WA (US);
Abstract
A method is described for tracking the position, orientation and/or guiding a transmitter as it moves through the ground in a region. The transmitter transmits an electromagnetic locating signal received by a detector. The detector, with the transmitter at a start position, receives the signal to produce a first set of electromagnetic data. The transmitter moves to a second position. The detector receives the signal with the transmitter at the second position to produce a second set of electromagnetic data. Absolute positions of the detector and the transmitter are determined within the region using certain information including the first and second sets of electromagnetic data.