My personal fact based experience...you have a per

My personal fact based experience...you have a person/company/entity work for you on a patent design/utility/intellectual provisional or otherwise...the owner is fully protected under patent law...any changes/revisions/improvements/alterations are ALL protected under an NDA or a workers agreement...IF you work for me on my design all of your efforts...everything you improve or change/alter is MINE. see Edison VS Tesla.