Just wanted to contribute a data point regarding A3: In Sweden there's a widely known inventor (or patent troll depending on your view of patent enforcement by non-operating entities) called Håkan Lans. Back in the 90ties he sued Hitachi for infringing on his computer color graphics patent. According to a documentary recently broadcast on Swedish television one of the reasons he was able to win that lawsuit was that someone in the US intelligence community (in a formal or informal capacity) helped him with background information on Hitachi's expert witnesses. The motivation was said to be that US felt threatened by Japan in general, and IBM by Hitachi in particular.

There where many other accusations brought in the same documentary, some of which I'm sceptical about, but this particular one seemed plausible. I can't find anything about it online, but the documentary presented it rather matter-of-factly with lots of interviews etc. So for the ambitious it might be an opportunity to document a concrete case of A3.