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:
Jul. 08, 2003
Filed:
Sep. 28, 2001
Applicant:
Inventors:
Wai Ha Wong, San Jose, CA (US);
I-Jaung Feng, Portola Valley, CA (US);
Assignee:
Varian, Inc., Palo Alto, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01V 3/00 ;
U.S. Cl.
CPC ...
G01V 3/00 ;
Abstract
A phase-shifted coil comprises nested concentric spiral portions, the terminals of which are progressively offset. Separately tuned concentric such coils of different dimensions exhibit relatively close intercoil clearance in one dimension and relatively large clearances in the orthogonal dimension provide different flux return characteristics for selective RF coupling.