FYI, I am in a hardware field and the companies I'm aware of (having had direct discussions with on CTO or senior engineer level) largely did patents to have something tangible to justify R&D to investors and financial analysts. They would never put know how that they considered crucial into a patent and considered patent litigation pretty worthless, especially against direct competitors, as they knew that everyone was violating everyone else's patents, because everyone working in the field comes up with the same solutions (so much for patents being non obvious to a subject expert).