Thread:Shabook/@comment-24675861-20141101141823/@comment-112155-20141101143310

Given that S.H.I.E.L.D. and HYDRA were so deeply intertwined, I find hard to separate who developed what and which one had the property.

But categories are not about "ownership", they are about "affiliation", and the Quinjets, the one used against Falcon and the ones stationed in the three Helicarriers, were affiliated with HYDRA.

Take a look at the Category:HYDRA category, and you'll see many similar cases.