Counsel registry

Representatives

Law firms representing parties in tracked US patent litigation. Counts come from per-case “Plaintiff representatives” and “Defendant representatives” sections. A firm with multiple attorneys on one case counts as a single appearance per side. Click any column header to sort; defaults to total cases, descending.

1464 firms · 10835 total appearances across 3697 cases with counsel data.

Firm	Plaintiff	Defendant	Total	Top courts	Top roles
Kenyon & Kenyon	—	2	2	Texas Eastern District Court(1)U.S. District Court for the District of Delaware(1)	of counsel · lead counsel
Fee, Smith & Sharp	2	—	2	U.S. District Court for the Eastern District of Texas(2)	of counsel
The Cooper Law Group	2	—	2	U.S. District Court for the Eastern District of Texas(2)	Counsel · Lead Counsel
Kendall Law Group	2	—	2	U.S. District Court for the Eastern District of Texas(1)U.S. District Court for the Southern District of California (Judge Irma E. Gonzalez; Magistrate William V. Gallo)(1)	Local Counsel · lead counsel
Brann & Isaacson	1	1	2	Texas Eastern District Court(1)U.S. District Court for the District of Delaware(1)	counsel · trial counsel · lead counsel
Microsoft Corporation	1	1	2	U.S. Court of Appeals for the Federal Circuit(1)U.S. District Court for the Eastern District of Texas(1)	Associate General Counsel · of counsel
D'Annunzio & D'Annunzio	2	—	2	D. Del.(2)	Lead Counsel · counsel
The Heartfield Law Firm	—	2	2	E.D. Tex.(1)U.S. District Court for the Eastern District of Texas(1)	local counsel · Lead Counsel
Crenshaw, Ware & Martin	2	—	2	Court of Appeals for the Federal Circuit(1)U.S. District Court for the Eastern District of Virginia(1)	Local Counsel · lead counsel
Hall Estill	—	2	2	Patent Trial and Appeal Board(1)U.S. District Court for the Central District of California(1)	Counsel · lead counsel
Troupis Law Office	1	1	2	U.S. District Court for the Central District of California(1)U.S. District Court for the Western District of Wisconsin(1)	Lead Counsel · Of Counsel · likely local counsel
Blackbird Technologies	2	—	2	U.S. District Court for the District of Delaware(2)	Lead Counsel · lead counsel / in-house
Unknown	2	—	2	Delaware District Court(1)U.S. Court of Appeals for the Federal Circuit(1)	of counsel · Federal Circuit counsel
Leason Ellis	1	1	2	California Northern District Court(1)U.S. District Court for the District of Delaware (Judge Richard G. Andrews)(1)	co-counsel · local counsel
Freeman Mathis & Gary	1	1	2	E.D. Tex.(1)U.S. District Court for the Illinois Central District Court(1)	lead counsel · defense counsel
Lee Sullivan Shea & Smith	1	1	2	Patent Trial and Appeal Board (PTAB)(1)U.S. District Court for the District of Delaware(1)	attorney · back-up counsel · lead counsel
King & Wood Mallesons	2	—	2	Patent Trial and Appeal Board (PTAB)(1)	counsel · Counsel · lead counsel
Progress	2	—	2	U.S. District Court for the Southern District of New York(2)	Special Counsel · Lead Counsel · Counsel
Clark Hill	—	2	2	Patent Trial and Appeal Board (PTAB)(1)U.S. District Court for the Eastern District of Texas(1)	counsel · Lead Counsel
Samsung Electronics America	1	1	2	Patent Trial and Appeal Board (PTAB)(1)U.S. District Court for the Eastern District of Texas(1)	in-house