|-
| style="background-color:#99ccff;;padding:0.079cm;"| <center>'''7'''</center>
| style=";padding:0.079cm;"| <center>US5824300 [http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=5824300.PN.&OS=PN/5824300&RS=PN/5824300] </center>
| style=";padding:0.079cm;"| <center>10/20/1998</center>
| style=";padding:0.079cm;"| <center>The Texas A&M University System</center>