I didn't write the code & the copyright hasn't been explicitly signed over. So, yeah, they own it.
What if I get new code written?
I designed the system that the code implemented. Does that count for anything?
What if I get new code written?
I designed the system that the code implemented. Does that count for anything?
If you are going to have to take on new developer resources anyway then a re-write from scratch might not be such a bad thing.