Usually patents and the risk of being sued out of existence despite having the right to implement clean-room clones. Patents use sly language and legalese spag

Usually patents and the risk of being sued out of existence despite having the right to implement clean-room clones. Patents use sly language and legalese spagetti. If your implementation looks similar, you may lose the right to manufacture certain parts or the entire thing. The law is deliberately vague and you are at the whims of the judge.