Where do you think they got the file? This file was posted in 2011 a year before the Replicator (the printer Wanhao ripped off for their duplicator line) so, this well predates their use of it. Second why are you thinking a company that only makes it's money by ripping off the designs of others would bother to own or attribute anything they use at will. And third, I never said I created the file, it was from a scanning project at University. Posted because it was there and I thought people would find uses for it. It would be nice to acknowledge my remix but not required. It has been used by dozens of 3d printer companies.
I appreciate you policing the Internet but there are better uses for your time.