Oh, please. It's standard industry practice for companies to claim ownership of everything a software engineer comes up with, even "on their own time". The problem is it's extremely difficult to say, figure out when someone might have invented some super clever idea which can be pantented "on their own time". This was true when I worked for MIT, VA Linux, IBM, and Google. At VA Linux it was the VC's which insisted on…
disclaimer: this post reflects my own personal views and not those of my employer.