I would expect someone with the title "senior engineer" to be getting in the ballpark of $300,000 total compensation. Otherwise, their version of "senior" means something different than what the market leaders call it. If this guy is getting $400,000 a year with the patent bonuses... it's probably money well spent. With the right patents, you can extort Samsung for a few billion here, Apple for a few billion there. $110,000 is pocket change. Just pay the guy that and make it unappealing to leave for Google and get an endless stream of patents that you can have in your back pocket for defense, at the very least.