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

  • Technical field:  Weapon (gun lock device, holster, magazine carrier, barrel for a firearm, rifle scope, ballistic vest, 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
128Langlotz Patent & Trademark Works Inc
226Bennet K Langlotz
322Shaddock Law Group
418Kilpatrick Townsend & Stockton
516Christensen Fonder Dardi & Herbert
615Donald J Ersler
714Neugeboren O'Dowd
813Lawrence Letham
913Eversheds Sutherland (US)
1013Cantor Colburn
1112Ballard Spahr
1212Lee & Hayes
1311Merchant & Gould
1411Barclay Damon
1510John A Chionchio Esquire
1610Dorsey & Whitney
179Knobbe Martens Olson & Bear
189Snell & Wilmer
199Finch & Maloney
209Fox Rothschild
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, Weapon 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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