Looks like the folks at Sikorsky now know how Stanley felt..
OH-5
In 1961, twelve companies submitted proposals to meet U.S.Army requirements for a four-seat turbine-powered light observation helicopter. After evaluation, three designs were selected and 5 of each: the Bell OH-4A; the Hiller OH-5 and the Hughes OH-6, were ordered for trials by the U.S.Army Aviation Board. The Hiller OH-5 was designed as a light observation helicopter for the Army, but it lost the competition. Stung by the loss of the OH-5 contract, however, which Hiller felt had been stolen by Hughes, Hiller Aircraft refused to bid on the next Army contract. This resulted in Bell winning the OH-58, and the virtual end of Hiller helicopters when production ended in 1973.