Foley & Lardner
Mixed-mu superconducting bearings
 A mixed-mu superconducting bearing including a ferrite structure disposed for rotation adjacent a stationary superconductor material structure and a stationary permanent magnet structure. The ferrite structure is levitated by said stationary permanent magnet structure. 
University of Chicago
Y Y F F F F
Y10T Y10T F16C F16F F16F F16C
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Thomas M. John R.
Mulcahy Hull