Quoted from flynnibus:Stern's marketing is being generous with the term 'we'. It is 'we' as in the people.. but not 'we' as including the company Stern Pinball. The people came from DE.. but not the company itself.
First rule.. never treat marketing as if it were an encyclopedia.
They are different corporate entities, but really, the same company, just sold and renamed a few times.
Stern Electronics -> Data East -> Sega -> Stern