Copter drone company, built on open source software (ArduPilot) - which worked for stimulating innovation and still exists in the open source. Founder Chris Anderson remains as the instigator of an open drone movement.
However, the copter company itself, which featured a number of patents - totally crashed from $360M valuation to debt between 2014-2017. Reportedly - bugged product, competition from China, and mismanagement, were the downfall. A good example of the economic warfare paradigm.