Welch Allyn, Inc. was founded in 1915 and is an American manufacturer of medical diagnostic devices, patient monitoring systems, and miniature precision lamps. A fourth generation family-owned business headquartered fewer than ten miles from where it was founded in 1915, Welch Allyn is still family owned and based primarily in the United States. Fortune Magazine named Welch Allyn to its list of the 100 Best Companies to Work For in 2003.