I am listed as (co)inventor for several patents from my last job with a big firm. All but a couple of them my report to my team lead was along the lines of “this new method does not provide a benefit over what’s existing, but also does not negatively impact.” It’s truly an experience sitting in a conference call with a company patent lawyer where you say one thing and then you listen to them spin it in a more positive light. The money needed to file the patents pay out patent bonuses (to the people listed as (co)inventors) is literally a rounding error. My team lead held on the order of tens of patents, all with similar findings, all filed to prevent our competition from patenting first.