USPat. 5,444,218

<body><table border="0" cellpadding="0" cellspacing="0" width="100%"><tr><td> <IFRAME src="http://leader.linkexchange.com/1/X822210/showiframe?" width="468" height="60" marginwidth="0" marginheight="0" hspace="0" vspace="0" frameborder="0" scrolling="no"> <a href="http://leader.linkexchange.com/1/X822210/clickle" target="_top"><img width="468" height="60" border="0" ismap alt src="http://leader.linkexchange.com/1/X822210/showle?"></a></IFRAME><br> <a href="http://leader.linkexchange.com/1/X822210/clicklogo" target="_top"><img src="http://leader.linkexchange.com/1/X822210/showlogo?" width="468" height="16" border="0" ismap alt></a><br>  </td></tr></table><table border="0" cellpadding="0" cellspacing="0" width="100%"><tr><td valign="top"> </td></tr></table><table border="0" cellpadding="0" cellspacing="0" width="100%"><tr><td> <div align="center"></div><dl> <dd><p align="center"><img src="_borders/images/goldbar.gif" border="0" alt WIDTH="576" HEIGHT="6"> </p> </dd> </dl> <table border="0" cellpadding="0" cellspacing="0" width="100%"> <tr> <td></td> </tr> </table> <table border="0" cellpadding="0" cellspacing="0" width="100%"> <tr> <td valign="top"><table width="714" height="199"> <tr> <td width="122" height="127"><p align="center"><img src="_borders/images/coaj320.jpg" WIDTH="105" HEIGHT="77"></td> <td width="312" height="127"><font color="#808000" face="Arial"><small><small>© Copyright 1998-2000<br> <strong>Laboratorio Dental Zimet Sternberg.<br> </strong>All rights reserved.<br> Av. 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