The greatest asset of any entrepreneur is the entrepreneur’s intellectual property (IP), i.e. the non-tangible assets that go into building or establishing a business.
The general assumption in law is that the owner of a work, is its creator as such if an employee creates any work whilst being employed by the employer, unless specifically stated, that employee owns such work.
As such, to validly transfer such work to the business, employees need to sign an IP/Invention Assignment Agreement assigning such ownership to the business.