Errata "All reference to Patent No. 5,464,015 to Albert F. Koch, III, et al. of Massachusetts for REAL-TIME ULTRASONIC ENDOCARDIAL DISPLACEMENT DISPLAY appearing in the Official Gazette of November 07, 1995 should be deleted since no patent was granted." "All reference to Patent No. 5,466,866 to James F. White of Ohio for PROCESS FOR THE PURIFICATION OF AROMATIC POLYCARBOXYLIC ACIDS appearing in the Official Gazette of November 14, 1995 should be deleted since no patent was granted."