Intangible Assets

6 Months Ended

Jun. 30, 2011

Intangible Assets.

Intangible Assets

2. Intangible Assets

Intangible assets consist of the following:

	June 30, 2011 (unaudited)			December 31, 2010
Patents	$	4,578,212		$	4,467,541
Accumulated amortization	(2,575,152		)	(2,399,801		)
Patents, net	2,003,060			2,067,740
Other intangibles	1,749,401			1,678,155
Accumulated amortization	(1,152,103		)	(984,463		)
Other intangibles, net	597,298			693,692
Intangible assets, net	$	2,600,358		$	2,761,432

Amortization expense associated with our intangibles was $172,542 and $164,218 in the three months ended June 30, 2011 and 2010, respectively, and $342,990 and $302,164 in the six months ended June 30, 2011 and 2010, respectively.  Amortization expense is included in general and administrative expenses in the accompanying condensed consolidated statements of operations.