Intangible Assets

12 Months Ended

Dec. 31, 2012

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets

4.  Intangible Assets

Intangible assets consisted of:

	2012		2011
Patents	$	1,982,918	$	1,885,888
Trademarks		601,716		565,273
Pac-Kit Tradename, Customer List		1,500,000		1,500,000
C-Thru, Customer List		1,050,000		-
		5,134,634		3,951,161
accumulated amortization		894,233		666,498
	$	4,240,401	$	3,284,663

Amortization expense for patents and trademarks for the years ended December 31, 2012, and 2011 were $227,662 and $183,385, respectively.   The estimated aggregate amortization expense for each of the next five succeeding years, calculated on a similar basis, is as follows:  2013 - $270,033; 2014 - $256,803; 2015 - $244,095; 2016 - $242,271; and 2017 - $238,328.