Description  Claims  Cited references 

US6368707B   [0006] 
US5385967A   [0007] 
US5306743A   [0008] 
US5837089A   [0009] 
US7700703B   [0010] 
US8383723B   [0011] 
WO2011017388A   [0012]  [0012] 
US7189461B   [0013] 
US4325856A   [0034] 
US4654397A   [0034] 
US4814373A   [0034] 

Bull. Am. Physics Soc.   [0035]