$PTEN SEC Filings

Filing Filed On
AUTO-GENERATED PAPER DOCUMENT 19 Apr 2012
NOTICE & PROXY STATEMENT 16 Apr 2012
DEFINITIVE ADDITIONAL MATERIALS 16 Apr 2012
FORM 4 SUBMISSION 04 Apr 2012
FORM 3 SUBMISSION 04 Apr 2012
FORM 4 SUBMISSION 29 Mar 2012
FORM 8-K 27 Mar 2012
LIVE FILING 16 Mar 2012
FORM 8-K 01 Mar 2012
FORM 4 SUBMISSION 29 Feb 2012
SC 13G/A 13 Feb 2012
FORM 10-K 10 Feb 2012
FORM 8-K 08 Feb 2012
LIVE FILING 02 Feb 2012
FORM 4 SUBMISSION 30 Jan 2012
FORM 3 SUBMISSION 06 Jan 2012
FORM 4 SUBMISSION 04 Jan 2012
FORM 4 SUBMISSION 04 Jan 2012
FORM 4 SUBMISSION 04 Jan 2012
FORM 4 SUBMISSION 04 Jan 2012