It's fairly impossible to know. Also, a creation could be made locally by someone, and still copied (whether from reverse engineering or an available template)

It's fairly impossible to know. Also, a creation could be made locally by someone, and still copied (whether from reverse engineering or an available template) and mass produced by someone else. This happens in any industry where duplication is easily (or not) possible and where there are people looking to make money - which is most industry.