Re: Just imagine the next case ...
I wouldn't consider the case vexatious or frivolous. The judge agreed that he had invented an email system, just that it wasn't the first, and not necessarily what anyone else would consider email we have today.
However, if the judge had said what we have now derived from that, he was first, then the statements against him would have been false, would have been libellous, would not have received first amendment protection, and he would have been entitled to damages.
There was legitimate disagreement and the court settled that. Exactly how it's meant to work.
If the court had considered it vexatious or frivolous they would have said so. Just because a ruling goes the way one always thought it should doesn't make it vexatious or frivolous.