The first gear that Bell made was clearly a copy of Eurocopter's, though they claimed otherwise, and because of this they couldn't / didn't want to move on with certification and production. A lot of this can be considered as not being patent infrigement (development and experimentation, prior art claims...).

They slightly modified the gear on the production models. Eurocopter claimed the slightly modified gear is essentially the same (likely true) and thus still infringes on the patent (the court ruled otherwise).

The judge said the new modified gear is okay but ordered the old ones to be destroyed.

A Pyrrhic tactical victory for Eurocopter (kept their patent at great cost) and a strategic defeat (as Bell is essentially still selling their tech).