If I wanted to be a stickler I could fight it. I can prove when I started making the design ect... Its not worth the time or money of a lawyer.
On the case of John Deere ect. They go to craft shows, flea markets, ect. Just like Disney and Harley davidson ect. They can seize all your items, PLUS your embroidery machine, screen printing stuff, and computer. Then you have to fight them in court. I don't know about you but those companies have a whole lot more money than I do.
If you look at some of the shows, my bling for the ring shirts have been copied too....

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Just have to bite my lip and smile.