This is the main patent: (please confirm you can get to it)? https://pdfpiw.uspto.gov/.piw?Docid=07107731&homeurl=http%3A%2F%2Fpatft.uspto.gov%2Fnetacgi%2Fnph-Parser%3FSect1%3DPTO2%2526Sect2%3DHITOFF%2526p%3D1%2526u%3D%25252Fnetahtml%25252FPTO%25252Fsearch-bool.html%2526r%3D1%2526f%3DG%2526l%3D50%2526co1%3DAND%2526d%3DPTXT%2526s1%3D%252522leep%252Binc%252522%2526OS%3D%2526RS%3D&PageNum=&Rtype=&SectionNum=&idkey=NONE&Input=View+first+page