For big companies sadly that's pretty normal from my experience, I've had to sign a similar agreement a couple times. That's how ebay is suing google for google

For big companies sadly that's pretty normal from my experience, I've had to sign a similar agreement a couple times. That's how ebay is suing google for google wallet. What you can do (what I do) is give a very broad prior art base (they can't claim any work you have previously worked on). When I was younger since I already worked on a huge range of projects they can't claim I originated an idea while working with them. Sometimes they are even willing to narrow the agreement, depending on the level of your position. Learned about it when I got screwed a few times during college for a couple inventions. At the time I thought the bonus was a fortune (5 figures), but looking back they screwed me royally.