If only anyone been able to establish this as a credible defense in court.
"This is my IP" is an absolutely valid defense in court. There have been tens of thousands of trials with IP infringement at its core.
https://en.wikipedia.org/wiki/List_of_copyright_case_law
https://en.wikipedia.org/wiki/List_of_patent_case_law
https://en.wikipedia.org/wiki/List_of_trademark_case_law
https://en.wikipedia.org/wiki/List_of_United_States_patent_l...
https://en.wikipedia.org/wiki/List_of_United_States_Supreme_...
https://en.wikipedia.org/wiki/List_of_United_States_Supreme_...
https://en.wikipedia.org/wiki/List_of_United_States_Supreme_...
Did you not know this?
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