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:
Mar. 09, 2004
Filed:
Dec. 23, 2002
Applicant:
Inventors:
Rogerio Noal Monteiro, Sudbury, CA;
Carl Richard Laamanen, Sudbury, CA;
Assignee:
Inco Limited, Toronto, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01C 1/704 ; G01C 1/00 ;
U.S. Cl.
CPC ...
G01C 1/704 ; G01C 1/00 ;
Abstract
A compass adapted to measure direction and dip values with or without the assistance of the earth's magnetic field. A laser pointer module and a magnetic needle module are interchangeably arranged in a body having an attached reference angle plate appropriately set to measure horizontal and vertical angles. The compass is especially useful in underground mines or other locations having magnetic anomalies where conventional magnetic compasses are rendered useless. Both embodiments are capable of taking readings when the compass is set in an upright or upside-down position.