Many companies allow you to hold on to "previous inventions" if you document them before signing up with them. It gets a bit fuzzier for projects you start whil

Many companies allow you to hold on to "previous inventions" if you document them before signing up with them. It gets a bit fuzzier for projects you start while working at said company, and the trouble of documenting said previous inventions is enough that I am not sure is worth it except in the case of major projects or patents granted to your name personally, though.