Lawyer here. Just very quickly, (i) a CEO's blog post itself is not legally binding on the company by nature, but it is a reflection of a corporate decision (typically the Board of Directors)behind the post. An action of this nature can only be challenged in court by the shareholders or dissenting board members in certain cases. (ii) a legal patent holder has every right of disposal over the patent, including the act of revoking it. (iii)I did not look for precedents for this but if a different company would re-issue Tesla's designs on their own name and tried to sue Tesla (i.e. trolling), I have serious doubts concerning not only on whether such revoked patents can be re-issued in somebody elses name but also, assuming thats possible, any judge or court would award any penalties to the original patent author in such lawsuit.
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