People seem to be commenting without having actually read the '520 patent. The claim is not to make support struts thinner, though that is a natural following benefit of the claimed technique.

What is actually claimed is a method of getting higher resolution layers out of a stereolithographic material than would normally be attained using the materials native cure depth. The method by which the higher resolution cross-sectioning could be achieved is what this patent claims.

You may not have read the patent carefully enough (or gotten past the 80-ish pages of drawings). What the patent is actual claiming is a way of getting higher resolution out of stereolithographic materials by blending cross-sectional layers that have a resolution greater than that of the material. By using the claimed method of blending those layers and varying the cure exposure times in just the right way, you can get thinner (higher-resolution) cross-sectional layers than the material, if cured using normal layer-by-layer techniques, would get alone.

It was a novel and non-obvious advance in stereolithographic techniques.

This is exactly why SLAPP laws exist:

"The typical SLAPP plaintiff does not normally expect to win the lawsuit. The plaintiff's goals are accomplished if the defendant succumbs to fear, intimidation, mounting legal costs or simple exhaustion and abandons the criticism. A SLAPP may also intimidate others from participating in the debate. A SLAPP is often preceded by a legal threat. The difficulty, of course, is that plaintiffs do not present themselves to the Court admitting that their intent is to censor, intimidate or silence their critics."

http://en.wikipedia.org/wiki/SLAPP

"The won was devalued by 100 percent, which meant 1,000 won suddenly had the purchasing power of 10 won."

This was the first thing in the article that I saw or read.

All these arguments are great, except that they mean nothing if the mark gets published in the Official Gazette and no one files a notice of opposition within 30 days. Then the mark will be presumed valid and harder to overturn. After a certain point, the mark can no longer be challenged, so it's best to get in opposition as early as possible.

If it gets past the first examiner, it will be published in the Official Gazette in the coming weeks (it's a weekly publication). That's when the notice of opposition should be filed. It costs $300, and requires proof of service to the applicant.