$PTIX SC 13D/A SEC Filings

Filed On	Filing
28 Feb 2020	SC 13D/A
23 Jun 2016	SCHEDULE 13D/A
07 Sep 2011	FORM SC 13D/A
03 Aug 2011	SC 13D/A
22 Jun 2011	SC 13D/A
04 Feb 2010	SC 13D/A
07 Jan 2010	SC 13D/A
06 Mar 2007	SC 13D/A
13 Feb 2006	SC 13D/A
18 Jul 2002	AMENDMENT NO 2 TO SCHEDULE 13D
18 Jul 2002	AMENDMENT NO 7 TO SCHEDULE 13D
13 Jan 2000	AMENDMENT NO. 6
21 Jan 1999	SC 13D/A
09 Oct 1998	SC 13D/A
08 Dec 1997	SCHEDULE 13D/A
07 Jul 1997	AMENDMENT NO. 4
07 Jul 1997	AMENDMENT NO. 4