I have successfully gotten those clauses removed when joining a new employer. Pro tip: state that expectation at the beginning of the hiring process. It's par

I have successfully gotten those clauses removed when joining a new employer. Pro tip: state that expectation at the beginning of the hiring process. It's part of the negotiation along with salary, working hours, etc. Don't wait until after they send you the contract. Their contract probably already has a clause for employees in California, so you can state expectations pretty easily with something like "btw, I'm not willing to sign an invention assignment clause that would violate California's labor code".