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6. PATENTS (Tables) | 12 Months Ended
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Dec. 31, 2013
Patents Tables |
Patents |
|  | 2013 Cost |  |  | Accumulated Amortization |  |  | 2013 Net |
Patents |  | $ | 249,284 |  |  | $ | 80,416 |  |  | $ | 168,868 |
|  | 2012 Cost |  |  | Accumulated Amortization |  |  | 2012 Net |
Patents |  | $ | 266,451 |  |  | $ | 65,939 |  |  | $ | 200,512 |
Estimated depreciation expense | Estimated depreciation expense over the next five years is as follows:
2014 |  | $ | 19,051 |
2015 |  |  | 19,051 |
2016 |  |  | 19,051 |
2017 |  |  | 19,051 |
2018 |  |  | 19,051 |

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