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.

1449 firms · 10749 total appearances across 3657 cases with counsel data.

Firm	Plaintiff	Defendant	Total	Top courts	Top roles
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
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
Unknown	2	—	2	Delaware District Court(1)U.S. Court of Appeals for the Federal Circuit(1)	of counsel · Federal Circuit counsel
Blackbird Technologies	2	—	2	U.S. District Court for the District of Delaware(2)	Lead Counsel · lead counsel / in-house
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
Hall Estill	—	2	2	Patent Trial and Appeal Board(1)U.S. District Court for the Central District of California(1)	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
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
D'Annunzio & D'Annunzio	2	—	2	D. Del.(2)	Lead Counsel · 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
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
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
The Cooper Law Group	2	—	2	U.S. District Court for the Eastern District of Texas(2)	Counsel · Lead Counsel
Fee, Smith & Sharp	2	—	2	U.S. District Court for the Eastern District of Texas(2)	of counsel
Kenyon & Kenyon	—	2	2	Texas Eastern District Court(1)U.S. District Court for the District of Delaware(1)	of counsel · lead counsel
Robins, Kaplan, Miller & Ciresi	2	—	2	California Northern District Court(1)U.S. District Court for the District of Delaware(1)	lead counsel · of counsel
Mann Law	1	1	2	Patent Trial and Appeal Board (PTAB)(2)	counsel · local counsel
Lawfair	1	1	2	Delaware District Court(1)United States District Court for the Eastern District of Virginia; U.S. Court of Appeals for the Federal Circuit (CAFC).(1)	Lead Counsel · lead counsel
Carella Byrne Cecchi Brody & Agnello	—	2	2	New Jersey District Court(2)	Local Counsel · local counsel
Hahn Loeser & Parks	1	1	2	California Northern District Court(1)U.S. District Court for the District of Massachusetts(1)	of counsel · Lead Counsel