2. Patents (Tables)

12 Months Ended

Dec. 31, 2012

Patents Tables

Patents

	December 30, 2012			December 31, 2011
Capitalized patent costs	$	642,000		$	640,000
Accumulated amortization		(618,000	)		(615,000	)
	$	24,000		$	25,000

Expected future amortization of patent costs

2013	4,000
2014	4,000
2015	4,000
2016	4,000
2017	4,000