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North Star Investment Management Corp.
> PDRT
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 06/30/2008 | PARTICLE DRILLING TECHNOLOGIES INC/NV | PDRT | 1,665 | 1,665 | 4,179 | 4,179 | $2.51 |
| 03/31/2008 | PARTICLE DRILLING TECHNOLOGIES INC/NV | PDRT | 3,000 | 3,000 | 5,820 | 5,820 | $1.94 |
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