Founded in 1935, Bell Helicopter Textron produces commercial, military, manned and unmanned vertical lift aircraft. The company serves customers throughout the world. Its aircraft models include the Bell 206L-4, Bell 407, Bell 412EP, Bell 427 and AH-1Z. Bell Helicopter Textron has achieved ISO 9001:2000 certification. It offers a range of financing and leasing options. The company operates plants in Texas and Canada. It also maintains logistics supply and service centers in Europe, Singapore and the United States. The company operates a subsidiary, Bell Aerospace Services, which offers logistics services. It manages an inventory of pre-owned aircraft. Bell Helicopter Textron is a wholly owned subsidiary of Textron, which additionally operates Cessna Aircraft Company, Jacobsen, Kautex and Lycoming.