Read the patent app here: http://appft1.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PG01&p= 1&u=/netahtml/PTO/srchnum.html&r=1&f=G&l=50&s1='20030189597'.PGNR.&OS=DN/200 30189597&RS=DN/20030189597 Look at the diagrams for their patent app here: http://aiw2.uspto.gov/.aiw?Docid=20030189597&homeurl=http%3A%2F%2Fappft1.usp to.gov%2Fnetacgi%2Fnph-Parser%3FSect1%3DPTO1%2526Sect2%3DHITOFF%2526d%3DPG01 %2526p%3D1%2526u%3D%2Fnetahtml%2FPTO%2Fsrchnum.html%2526r%3D1%2526f%3DG%2526 l%3D50%2526s1%3D'20030189597'.PGNR.%2526OS%3DDN%2F20030189597%2526RS%3DDN%2F 20030189597&PageNum=&Rtype=&SectionNum=&idkey=352C9E48F7E1 The funny part is to read the 'Brief Descriptions of the Drawing'...those of you aith *any* background in Linux/UNIX will immediately see the problem. Funny funny stuff. Jerrod Howard OMRF Imaging Facility