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

  • Technical field:  Sound (digital audio processing, tuning device, speech processing, voice search, noise cancellation, microphone, piano, electronic instrument, 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
1106Fish & Richardson
275Perkins Coie
370Sughrue Mion
450Michael A Glenn
549Knobbe Martens Olson & Bear
649Oblon McClelland Maier & Neustadt
748Pierce Atwood
842Lee & Hayes
936Wolf Greenfield & Sacks
1036Harness Dickey & Pierce
1136Toler Law Group
1235Schwegman Lundberg & Woessner
1335Dentons US
1434Greenblum & Bernstein
1533Haynes & Boone
1631Kilpatrick Townsend & Stockton
1729Birch Stewart Kolasch & Birch
1826Cantor Colburn
1925Foley & Lardner
2025Shumaker & Sieffert
2125Brooks Kushman
2222Brinks Gilson & Lione
2322McDermott Will & Emery
2421Tutunjian & Bitetto
2521Womble Bond Dickinson (US)
2621Fitch Even Tabin & Flannery
2721Rossi Kimms & McDowell
2821Chip Law Group
2920Morgan Lewis & Bockius
3020Alston & Bird
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, Sound 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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