Gentex Corp was organized as a Michigan company in 1974. 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 business segment involves designing, developing, manufacturing and marketing interior and exterior auto-dimming automotive rearview mirrors that utilize proprietary electrochromic technology to dim in proportion to the amount of headlight glare from trailing vehicle headlamps. The Company ships its product to all of the major automotive producing regions worldwide, which it supports with numerous sales, engineering and distribution locations worldwide. The Company is a supplier of automatic-dimming rearview mirrors and electronics to the automotive industry, dimmable aircraft windows for aviation markets, and fire protection products to the fire protection market. Automotive applications are the largest business segment for the Company, consisting of interior and exterior electrochromic automatic-dimming rearview mirrors and automotive electronics. The Company manufactures interior electrochromic automatic-dimming rearview mirrors that darken to reduce glare and improve visibility for the driver. In North America, Europe and Asia, the Company markets its products primarily through a direct sales force through its sales and engineering offices located in, Germany, UK, Sweden, France, Japan, Korea and China, as well as its' headquarters in Michigan. The Company manufactures photoelectric smoke detectors and alarms, photoelectric smoke detectors and visual signaling alarms, photoelectric smoke detectors and electrochemical carbon monoxide alarms, electrochemical carbon monoxide detectors and alarms, audible and visual signaling alarms, and bells and speakers for use in fire detection systems in office buildings, hotels, and other commercial establishments, as well as residential applications. The Company's fire protection products are sold directly to fire protection and security product distributors under the Company's brand name, to electrical wholesale houses, and to original equipment manufacturers of fire protection systems under both the Company's brand name and private labels. The fire protection products industry is highly competitive in terms of both the smoke detectors and signaling appliance markets. It offers variable dimmable windows to the aircraft manufacturers. The Company owns 21 U.S. trademarks and 421 U.S. patents, 388 of which relate to electrochromic technology, automotive rearview mirrors, microphones, displays, cameras and/or sensor technology.