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Intangibles (Tables)
 6 Months Ended
Jun. 30, 2012
Intangibles [Abstract]  
Gross carrying amount and accumulated amortization of amortizable intangible assets
The gross carrying amount and accumulated amortization of amortizable intangible assets:

   
 
Industrial
Hardware
Segment
 
 
Security
Products
Segment
 
 
Metal
Products
Segment
 
 
 
 
Total
 
Weighted-Average
Amortization Period (Years)
 
2013 Patents and developed
technology
                             
Gross Amount:
 
$
2,656,675
 
$
1,042,132
 
$
5,839
 
$
3,704,646
 
15.4
 
Accumulated Amortization:
   
1,648,103
   
481,149
   
5,838
   
2,135,090
     
Net June 29, 2013 per Balance Sheet
 
$
1,008,572
 
$
560,983
 
$
1
 
$
1,569,556
     


2012 Patents and developed
technology
                             
   Gross Amount:
 
$
2,732,307
 
$
1,021,409
 
$
5,839
 
$
3,759,555
 
15.8
 
   Accumulated Amortization:
   
1,652,199
   
447,732
   
5,667
   
2,105,598
     
Net December 29, 2012 per Balance Sheet
 
$
1,080,108
 
$
573,677
 
$
172
 
$
1,653,957