My question involves business law in the state of: Washington
We live in the state of Washington, in the Seattle area. I am employed with a large tech company in the area -- let's say it's one of Microsoft, Amazon, or Google. My employer has their fingers in lots of pies, and lots of highly paid corporate lawyers. My wife has some ideas about starting her own business which would be based on the web, having to do with travel and activities. She has asked me to help design and implement the website and backend systems for the business. I worry about my employer claiming rights over anything I come up with in my free time at home, since there was an invention assignment agreement I signed when I joined. My question is, how enforceable is that sort of agreement in the state of Washington, for IP invented in your own personal time outside of work, without using any corporate materials? Should I contact the corporate lawyers and try to get some sort of clarified agreement set up before we start creating anything to protect ourselves?