5 microspheres, namely, microscopically sized balls and capsules designed to be administered to the body, sold empty; microspheres containing pharmaceutical preparations and substances, namely, imaging reagents, diagnostic reagents, ultrasound contrast agents pulmonary, transdermal, oral, parenteral and depot therapy drug formulations, antibiotics, anti-inflamatories, conventional drugs, protein, peptides and genes; drug delivery systems, namely, vehicles and carriers designed to transport drugs to required sites within the body administered intravenously, transdermally, orally, pulmonarily, buccally or nasally