The following table shows the ranking of United States IP law firm. The ranking is based on the following conditions.

  • Technical field:  Pharmaceutical (pharmaceutical composition, medicine, API, production method of thereof, etc.)
  • Status:  United States granted patents in 2018 (registration date).
  • Count:  The number of patents represented by each United States IP law firm, attorney or agent was counted.  Even if attorney or agent belongs to a law firm, they were counted separately.
RankingNo.IP law firm
1303Fish & Richardson
2245Wolf Greenfield & Sacks
3232Foley & Lardner
4207Knobbe Martens Olson & Bear
5197Wilson Sonsini Goodrich & Rosati
7146Bozicevic Field & Francis
8145McCarter & English
9136Morrison & Foerster
10135Mintz Levin Cohn Ferris Glovsky & Popeo
11134Oblon McClelland Maier & Neustadt
12132Kilpatrick Townsend & Stockton
13132Klarquist Sparkman
14125Jones Day
15121Sterne Kessler Goldstein & Fox
16121Finnegan Henderson Farabow Garrett & Dunner
17111Marshall Gerstein & Borun
18110Birch Stewart Kolasch & Birch
19105Sughrue Mion
20104Saliwanchik Lloyd & Eisenschenk
21103Clark & Elbing
2295K&L Gates
2395Leydig Voit & Mayer
2494Lathrop Gage
2592Nixon Peabody
2692McDonnell Boehnen Hulbert & Berghoff
2792Goodwin Procter
2889Foley Hoag
2989Morgan Lewis & Bockius
3083Parker Highlander
3181McBee Moore Woodward & Vanik IP
3274Wenderoth Lind & Ponack
3371Susan McBee
3470Womble Bond Dickinson (US)
3569Casimir Jones SC
3669Schwegman Lundberg & Woessner
3769Norton Rose Fulbright US
3868Brinks Gilson & Lione
3966Choate Hall & Stewart
4061Buchanan Ingersoll & Rooney
In preparing the table, a patent search expert conducted a patent search using patent classification and keywords (as necessary) in order to extract patents in specific technical field (here, Pharmaceutical field).
In the patent search, it was confirmed that a high-accuracy population (i.e., a population not including non-relevant fields) of patents was obtained. Subsequently, the population was used to create the table.

By entering the Firm name in the "Attorney or Agent" column of USPTO database, you can find the patent information handled by each Firm.

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