Gentex Corp. engages in the business of designing, developing, manufacturing, marketing, and supplying digital vision, connected car, dimmable glass, and fire protection technologies including automatic-dimming rearview and non-dimming 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. It operates under the Automotive Products and Other segments. The Automotive Products segment focuses on operating virtually all the foregoing facilities. The Other segment includes dimmable aircraft windows, fire protection products, nanofiber, and medical. The company was founded by Fred Bauer in 1974 and is headquartered in Zeeland, MI.