Der-Yung Liou
Der-Yung Liou is a USPTO correspondent of record on 302 trademark filings, 298 currently live. The correspondent has worked across 225 distinct trademark owners — a broad client roster of mostly one-off filings at roughly 1.3 marks per client. In TTAB matters, Der-Yung Liou is attorney of record on 1 contested oppositions and cancellations, more often as plaintiff (1) than defendant (0).
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Editorial deep dives on prosecution strategy, TTAB, and brand portfolios
Refusals 101, Part 2: Section 2(d) — The Register's Biggest Fight
Section 2(d) is the most common substantive reason the USPTO refuses a trademark — and the one most likely to kill a name you've already fallen in love with. Here's what examiners actually compare.
How a Name Becomes Unownable: OSHO and the Anatomy of a Generic Trademark
Seventeen years after the TTAB ruled OSHO generic, the register tells the whole story: twenty OSHO marks ever filed, eighteen dead - and the only live OSHO word registration belongs to a Mexican beverage company.
The DEMON HUNTER Trademark That Netflix Filed Right Past
A Christian metal band sued Netflix over KPOP DEMON HUNTERS. The USPTO register shows a first DEMON HUNTER registration the band let die in 2014 — and a live one it rebuilt in 2022.