I'm a bit confused here? The OP basically said "your LLC created the IP and now a C-Corp owns but it never legally transferred it". IANAL, but from what they've told me, if IP is transferred from one entity to another you must make a transaction. You can't simply say "I made this so wherever I go to next, that entity owns it"
Source - I've had the same situation and discussed with a lawyer.
Source - I've had the same situation and discussed with a lawyer.