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:
Feb. 17, 2009
Filed:
Jan. 22, 2004
Richard D. Ogilvy, Kinoulton, GB;
Philip I. Meldrum, Burton Joyce, GB;
Oliver Kuras, Wollaton, GB;
David Beamish, Edwalton, GB;
Richard D. Ogilvy, Kinoulton, GB;
Philip I. Meldrum, Burton Joyce, GB;
Oliver Kuras, Wollaton, GB;
David Beamish, Edwalton, GB;
Natural Environment Research Council, Wiltshire, GB;
Abstract
Disclosed is a measurement system for measuring subsurface resistivity. The surfaces of interest are, for example, engineered surfaces such as roads and dams, and non-engineered surfaces such as greenfield sites. The measurement system may also be used on biological materials. The system includes signal input electrodes for inputting an input signal into subsurface material by capacitive coupling. Pairs of signal detection electrodes allow capacitive coupling detection of a detectable signal caused by the input signal in at least some of the subsurface material. A phase-sensitive meter such as a lock-in amplifier is provided to measure the amplitude and phase of the detectable signal.