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Form Type:  5
Filing Date:  1/31/2012 
CIK:  0000355811 
Address:  600 N CENTENNIAL ST 
City, State, Zip:  ZEELAND, Michigan 49464 
Telephone:  (616) 772-1800 
Fiscal Year:  12/31 
Last Trade
Last Trade: 
-0.20 (-1.16%)  
Trade Time: 
Aug 18  
Market Cap: 
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Description of Business
Gentex Corporation (the "Company") designs and manufactures automatic-dimming rearview mirrors and electronics for the automotive industry, dimmable aircraft windows for the aviation industry, and commercial smoke alarms and signaling devices for the fire protection industry. The Company's largest business segment involves designing, developing, manufacturing and marketing interior and exterior automatic-dimming automotive rearview mirrors that utilize proprietary electrochromic technology to dim in proportion to the amount of headlight glare from trailing vehicle headlamps. Within this business segment, the Company also designs, develops and manufactures various electronics that are value added features to the interior and exterior automotive rearview mirrors as well as interior visors, overhead consoles, and other locations in the vehicle.