Intangible assets
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Dec. 31, 2012
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Intangible Assets, Net (Excluding Goodwill) [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Intangible assets |
Intangible assets
The Company capitalized $17,314 and $22,036 of product certification costs during the years ended December 31, 2012 and 2011, respectively. Also included in intangible assets are the costs incurred by the Company to acquire certain patents. These patents, once in service, will be amortized on a straight-line basis over the estimated economic life of the associated product, which range from approximately 7-10 years. The Company capitalized $146,981 and $16,712 of patent-related costs during the years ended December 31, 2012 and 2011, respectively. Intangible assets at December 31, 2012 and 2011 consist of the following:
Amortization expense was $33,896 and $23,992 during the years ended December 31, 2012 and 2011, respectively. Estimated amortization expense at December 31, 2012 for each of the five succeeding years is as follows:
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