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:
Dec. 09, 1986
Filed:
Apr. 22, 1983
Applicant:
Inventors:
David E Johnson, Los Banos, CA (US);
Richard W Williams, Dos Palos, CA (US);
Assignee:
FRL, Inc., Los Banos, CA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01V / ; G01V / ; G01N / ; G01R / ;
U.S. Cl.
CPC ...
324329 ; 324233 ; 324225 ;
Abstract
Metal detector for locating and classifying metal objects of different types in the ground or other surroundings. Automatic compensation is provided for signals produced by magnetic materials in the soil and by misalignment of the coils in the sensing head.