Earlier quoted context omitted.
Ah, but you are overlooking the key difference: you cannot commercialize an engine without building it. With software, commercialization costs "nothing" [1]. A smaller company could come up with a unique engine design, but without patent protection, a bigger company could just drop by and take the design and build it themselves. In other words, the larger company would get R&D "for free". In the engineering world, on…
I don't think that's really different between hardware and software. Even in software, the bigger company often has a decisive advantage in marketing. The history of computing is littered with the graves of small companies crushed by behemoths. So that might actually be an argument in favor of software patents, if they actually did protect the interests of small companies. Unfortunately it's almost impossible to impl…
Marketing budget is something inherent in small vs. big companies in all industries, so I do not agree that the fact that software and hardware share this makes them similar.
Your example does demonstrate a benefit of software patents in theory, but is this how they are typically used in practice?