The list is prepared based on the total number of utility patents filed by the US patent law firms in the last decade (2011 to 2020). We have filtered legal departments of organizations and only the top law firms have been shortlisted.
| Law Firm | Application Count |
| Oblon Mcclelland Maier & Neustadt LLP | 63166 |
| Sughrue Mion PLLC | 46234 |
| Birch Stewart Kolasch & Birch LLP | 39082 |
| Oliff PLC | 37601 |
| Knobbe Martens Olson & Bear LLP | 33650 |
| Foley & Lardner LLP | 30225 |
| Nixon & Vanderhye PC | 24469 |
| Muncy Geissler Olds & Lowe PC | 20546 |
| Venable LLP | 18312 |
| JCIPRNET | 17707 |
| Cantor Colburn LLP | 16840 |
| Scienbizip PC | 16155 |
| Harness Dickey Troy | 15846 |
| Wenderoth Lind & Ponack LLP | 15698 |
| Banner & Witcoff LTD | 14999 |
| Dentons LLP | 14720 |
| Buchanan Ingersoll & Rooney PC | 13903 |
| Westerman Hattori Daniels & Adrian LLP | 13410 |
| Finnegan Henderson Farabow Garrett & Dunner | 13195 |
A few law firms like Oblon Mcclelland Maier & Neustadt LLP, Sughrue Mion PLLC, Birch Stewart Kolasch & Birch LLP, and Oliff PLC, etc. have consistently filed the most number of patent applications over the years. In fact, all these four law firms have made it to the top 4 patent filers without fail in the last 10 years.
Interestingly, JCIPRNET and Scienbizip were the top non-US-based law firms that were the constant sight in the list of top patent filers in the past 10 years. Though these firms have their offices in the USA both of them are based out of the far east i.e. Taiwan and China respectively.