$PTEN SEC Filings

Filing Filed On
MAIN DOCUMENT DESCRIPTION 03 Jan 2008
MAIN DOCUMENT DESCRIPTION 03 Jan 2008
MAIN DOCUMENT DESCRIPTION 06 Nov 2007
FORM 4 SUBMISSION 03 Oct 2007
FORM 4 SUBMISSION 24 Apr 2007
FORM 4 SUBMISSION 24 Apr 2007
FORM 4 SUBMISSION 24 Apr 2007
FORM 4 SUBMISSION 24 Apr 2007
FORM 4 SUBMISSION 09 Apr 2007
FORM 4 SUBMISSION 26 Mar 2007
FORM 4 SUBMISSION 02 Mar 2007
FORM 4 SUBMISSION 22 Feb 2007
FORM 4 SUBMISSION 05 Jan 2007
FORM 4 SUBMISSION 05 Jan 2007
FORM 4 SUBMISSION 05 Jan 2007
FORM 4 SUBMISSION 05 Jan 2007
FORM 4 SUBMISSION 05 Jan 2007
FORM 4 SUBMISSION 29 Dec 2006
FORM 4 SUBMISSION 15 Dec 2006
FORM 4 SUBMISSION 12 Sep 2006