$PTN SEC Filings

Filing Filed On
FORM S-8 26 Sep 2022
PRIMARY DOCUMENT 14 Sep 2018
REGISTRATION STATEMENT 14 Nov 2017
REGISTRATION STATEMENT 15 Nov 2016
S-8 31 Jul 2015
FORM S-8 30 Sep 2013
S-8 16 May 2011
S-8 17 Nov 2009
S-8 07 Feb 2008
S-8 06 Oct 2005
1996 STOCK OPTION PLAN INCREASE 06 Mar 2002
REGISTRATION STATEMENT ON FORM S-8 17 Jun 1998