Hiller Aircraft Corporation was an American aerospace manufacturer founded in 1944 by Henry Hiller. The company specialized in designing and producing helicopters and other vertical lift aircraft. Hiller is known for its innovative rotorcraft technology, including the development of the Hiller UH-12, which was widely used for agricultural and utility purposes. Throughout its history, Hiller Aircraft Corporation contributed to various military and civilian aviation projects. The company played a significant role in the advancement of helicopter design, particularly with its unique rotor systems. Hiller's legacy continues to influence modern helicopter engineering and design practices.