| Filed On | Filing |
|---|---|
| 08 Dec 2010 | SC 13G/A |
| 08 Oct 2010 | PTEC AS OF 9/30/2010 |
| 13 Sep 2010 | SC 13G/A |
| 08 Jul 2010 | SC 13G/A |
| 16 Feb 2010 | AMENDMENT NO. 2 TO SCHEDULE 13G |
| 16 Feb 2010 | SC 13G/A |
| 12 Feb 2010 | 13G/A |
| 11 Jan 2010 | PTEC AS OF 12/31/2009 |
| 17 Feb 2009 | AMENDMENT NO. 1 TO SCHEDULE 13G |
| 13 Feb 2009 | SC 13G/A |
| 08 Feb 2008 | SC 13G/A |
| 06 Feb 2008 | SCHEDULE 13G |
| 10 Jan 2008 | SC 13G/A |
| 14 Feb 2007 | SC 13G/A |
| 09 Feb 2007 | SCHEDULE 13G |
| 19 Jan 2007 | SC 13G/A |
| 10 Jul 2006 | SC 13G/A |
| 13 Feb 2006 | SCHEDULE 13G/A |
| 13 Feb 2006 | SCHEDULE 13G/A |
| 10 Feb 2006 | SC 13G/A |
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