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. 19, 2006
Filed:
Oct. 25, 2005
Applicants:
Shigekazu Shimizu, Saitama-ken, JP;
Yasuo Takahashi, Tokyo, JP;
Yukio Kishimoto, Kobe, JP;
Tomoaki Ueda, Kyoto, JP;
Kazuhito Nakamura, Ashiya, JP;
Inventors:
Shigekazu Shimizu, Saitama-ken, JP;
Yasuo Takahashi, Tokyo, JP;
Yukio Kishimoto, Kobe, JP;
Tomoaki Ueda, Kyoto, JP;
Kazuhito Nakamura, Ashiya, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01V 3/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
A current to be applied to a ground is defined as the sum of two sinusoidal waves having first and second frequency components. A signal to be used at the time of synchronous detection is defined as a difference between the sinusoidal waves having the first and second frequency components. As a result, a substance in the ground, and the position and depth of the substance can be specified with high accuracy.