Neil D. Greenstein
Neil D. Greenstein is a USPTO correspondent of record based in Arlington, Virginia, listed on 143 trademark filings (34 currently live). The correspondent has worked across 46 distinct trademark owners — a mid-breadth client roster at roughly 3.1 marks per client. In TTAB matters, Neil D. Greenstein is attorney of record on 6 contested oppositions and cancellations, more often as plaintiff (5) than defendant (1). The correspondent is associated with TechMark a Law Corporation.
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Editorial deep dives on prosecution strategy, TTAB, and brand portfolios
Class 42 Is Up 20% Year Over Year While the Rest of the Register Flatlines
Software and technology-services filings in Class 42 hit 6,632 in September 2026, up 20.2% from a year earlier and the biggest year-over-year gain of any top-15 class. Total applications slipped 0.7% to 55,684.
TTAB in Q3 2026: Contested Filings Rise 3.9% While Defaults End 56% of Oppositions
Oppositions and cancellations filed at the TTAB rose 3.9% to 3,044 in Q3 2026. Of the 2,937 that ended during the quarter, 1,636 (55.7%) ended in default because the respondent never answered.
How the Thirteen du Pont Factors Actually Get Weighed
The thirteen factors were never a scoring rubric: two keystones decide most cases, any single factor can end one, and the rest move only when someone pays to put evidence in. The finale of our thirteen-part series, with the scoreboard of every case it covered.