Robert W. Sacoff
Robert W. Sacoff is a USPTO correspondent of record based in Chicago, Illinois, listed on 954 trademark filings (61 currently live). The correspondent has worked across 406 distinct trademark owners — a broad client roster of mostly one-off filings at roughly 2.3 marks per client. In TTAB matters, Robert W. Sacoff is attorney of record on 114 contested oppositions and cancellations, more often as plaintiff (74) than defendant (40). The correspondent is associated with PATTISHALL, MCAULIFFE, NEWBURY, HILLIARD & GERALDS.
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Explore the Trademark Intelligence Library
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.