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:
Apr. 29, 1997
Filed:
Jul. 08, 1994
Applicant:
Inventors:
David L Herrick, Mont Vernon, NH (US);
William F Matthews, III, Hudson, NH (US);
Assignee:
Lockheed Sanders, Inc., Nashua, NH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01S / ; G01S / ;
U.S. Cl.
CPC ...
342449 ; 342194 ; 342442 ; 342419 ;
Abstract
An apparatus and method are described for direction finding the source of emf emissions including a monotone signal by detecting the phase changes of the monotone signal during movement relative to the source. A software embodiment measures the amount of phase change.