IP law rules that unless a contract has been entered into to the contrary, the IP is the property of the inventor. In the case of software – where the inventor has not shared his source code, there is no practical way anyone else can ‘take’ your invention off you – therefore there is no burden on you – and legally, you own the stuff anyway.

Keep in mind this is Australian Legislation but I should imagine it would be the same in the states – and that my experience is purely in the software context.}