Company lists · Data refreshed September 2026

Top 25 Appellate patent law firms based in Los Angeles, United States

Name: Appellate patent law firms based in Los Angeles, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 27, 2026 55 companies tracked

RevenueBase identified 55 appellate patent law firms headquartered in Los Angeles, United States as of September 2026 and tracks 1,041 professional contacts across them, including 554 with verified work emails. Across the United States, New York is the largest hub for this category (91 companies); Los Angeles has 55.

This list covers appellate patent law firms headquartered in Los Angeles, United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 27, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 27, 2026 86% judged on-target in blind review

55Companies

1,041Contacts tracked

554Verified emails

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The 25 largest appellate patent law firms based in Los Angeles, United States

Ranked by team size

Top 25 of 55 appellate patent law firms based in Los Angeles, United States, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to appellate patent law firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Irell & Manella LLP	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 27, 2026	201-500	258 contacts →
	Partial evidence “Irell & Manella LLP is a law firm focused on complex commercial and IP litigation.” Source: RevenueBase Database · checked Sep 27, 2026
2	Glaser Weil	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 27, 2026	51-200	172 contacts →
	Partial evidence “Glaser Weil is a premier law firm headquartered in Los Angeles with outstanding experience and market-leading successes in litigation, corporate, intellectual property and real…” Source: RevenueBase Database · checked Sep 27, 2026
3	Russ, August & Kabat	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 27, 2026	51-200	75 contacts →
	Indirect evidence “Russ August & Kabat was founded in 1990 by Larry Russ, Rick August and Jules Kabat.” Source: RevenueBase Database · checked Sep 27, 2026
4	Ellis George LLP	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 27, 2026	51-200	71 contacts →
	Indirect evidence “Ellis George LLP is a leader in business litigation that has been providing creative solutions, efficient teamwork and fearless advocacy to its clients for over 40 years.” Source: RevenueBase Database · checked Sep 27, 2026
5	Miller Barondess, LLP	Strong evidence	Los Angeles, CA, United StatesHQ checked Sep 27, 2026	51-200	70 contacts →
	Strong evidence “Miller Barondess, LLP, is a Los Angeles-based law firm specializing in litigation, trial, and appellate practice in California and around the country.” Source: RevenueBase Database · checked Sep 27, 2026
6	Greines, Martin, Stein & Richland LLP	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 27, 2026	11-50	46 contacts →
	Partial evidence “Greines, Martin, Stein & Richland LLP (GMSR) has been one of the leading civil appellate firms in the country for more than 40 years.” Source: RevenueBase Database · checked Sep 27, 2026
7	LTL Attorneys LLP	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 27, 2026	51-200	29 contacts →
	Indirect evidence “Trusted by general counsel of leading global companies, our highly skilled lawyers focus solely on trials and litigation.” Source: RevenueBase Database · checked Sep 27, 2026
8	Kibler Fowler & Cave LLP	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 27, 2026	11-50	28 contacts →
	Indirect evidence “Kibler Fowler & Cave LLP is an award-winning boutique trial and litigation firm headquartered in Los Angeles, with offices in New York, Philadelphia and Princeton.” Source: RevenueBase Database · checked Sep 27, 2026
9	Waymaker LLP	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 27, 2026	11-50	24 contacts →
	Indirect evidence “Waymaker LLP is known for winning trials and appeals across the county for clients that include Fortune 500 companies, startups and high net-worth individuals.” Source: RevenueBase Database · checked Sep 27, 2026
10	Kubota & Basol LLP	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 27, 2026	11-50	24 contacts →
	Partial evidence “We provide highest-quality patent legal services with the agility and flexibility to sustainably meet our clients' patent needs into the future.” Source: RevenueBase Database · checked Sep 27, 2026
11	Willenken LLP	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 27, 2026	11-50	19 contacts →
	Indirect evidence “Willenken is a premier boutique litigation firm renowned for our attorneys’ formidable trial capabilities and innovative strategic acumen.” Source: RevenueBase Database · checked Sep 27, 2026
12	Isaacs Friedberg Zill LLP	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 27, 2026	11-50	12 contacts →
	Indirect evidence “Founding partners Jeff Isaacs and Jerry Friedberg are former Assistant U.S.” Source: RevenueBase Database · checked Sep 27, 2026
13	MSD Lawyers	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 27, 2026	1-10	12 contacts →
	Indirect evidence “Located in downtown Los Angeles, Mills Sadat Dowlat LLP represents clients in industries as diverse as the city itself.” Source: RevenueBase Database · checked Sep 27, 2026
14	Ruttenberg IP Law, A Professional Corporation	Strong evidence	Los Angeles, CA, United StatesHQ checked Sep 27, 2026	1-10	11 contacts →
	Strong evidence “Ruttenberg IP Law, A Professional Corporation is a boutique intellectual property litigation law firm based in Century City that focuses primarily on patent litigation matters and…” Source: RevenueBase Database · checked Sep 27, 2026
15	Nassiri & Jung LLP	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 27, 2026	11-50	11 contacts →
	Partial evidence “Nassiri & Jung attorneys focus on complex litigation, employment law, and appeals.” Source: RevenueBase Database · checked Sep 27, 2026
16	Orbit IP	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 27, 2026	1-10	9 contacts →
	Partial evidence “We are a specialty firm dedicated to business and intellectual property law.” Source: RevenueBase Database · checked Sep 27, 2026
17	Meylan Davitt Jain Arevian & KIM LLP	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 27, 2026	11-50	8 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 27, 2026
18	Liang LY LLP	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 27, 2026	1-10	8 contacts →
	Partial evidence “Liang Ly LLP is a boutique litigation law firm devoted to providing the highest quality of legal representation for its clients.” Source: RevenueBase Database · checked Sep 27, 2026
19	Command IP LLP	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 27, 2026	1-10	7 contacts →
	Partial evidence “Command IP LLP (rebranded from Concept IP LLP) is an Intellectual Property Law Firm For Innovators.” Source: RevenueBase Database · checked Sep 27, 2026
20	Martorell LAW APC	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 27, 2026	1-10	6 contacts →
	Partial evidence “Martorell Law APC is a full-service litigation firm comprised of attorneys who have the expertise, passion, and drive to best position their clients for a favorable result.” Source: RevenueBase Database · checked Sep 27, 2026
21	Hatch LAW PC	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 27, 2026	1-10	5 contacts →
	Partial evidence “Hatch Law PC is an intellectual property and civil litigation firm based in Los Angeles, California.” Source: RevenueBase Database · checked Sep 27, 2026
22	Spertus, Landes & Josephs, LLP	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 27, 2026	11-50	4 contacts →
	Indirect evidence “We focus on achieving extraordinary results for our clients by providing exceptional legal service in a cost-effective and creative manner, while at all times remaining committed…” Source: RevenueBase Database · checked Sep 27, 2026
23	Hankin Patent Law, APC	Strong evidence	Los Angeles, CA, United StatesHQ checked Sep 27, 2026	1-10	4 contacts →
	Strong evidence “Hankin Patent Law, APC provides legal counsel and litigation services in intellectual property law.” Source: RevenueBase Database · checked Sep 27, 2026
24	Sadeghian LAW Firm	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 27, 2026	1-10	4 contacts →
	Indirect evidence “Nima Sadeghian is a nationally recognized trial attorney who always listens and works closely with his clients.” Source: RevenueBase Database · checked Sep 27, 2026
25	Howarth & Smith	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 27, 2026	11-50	3 contacts →
	Indirect evidence “Howarth & Smith handles trials for plaintiffs and defendants in high-profile, high-stakes litigation throughout the United States.” Source: RevenueBase Database · checked Sep 27, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: appellate patent law firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names appellate patent law firms.
Partial evidence: Its own public description names part of appellate patent law firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name appellate patent law firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 55 appellate patent law firms based in Los Angeles, United States

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Appellate patent law firms based in Los Angeles, United States at a glance

As of Sep 27, 2026

53.2%Verified-email coverage

18.9Average contacts per company

1-10Median size (employees)

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

Email recency for this list is measured across the whole United States list rather than for Los Angeles, so it is reported there. Company counts and contact totals on this page are exact for Los Angeles, over 55 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among appellate patent law firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Los Angeles, United States whose own description of what they do matches “appellate patent law firms”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names appellate patent law firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among appellate patent law firms, and records with no verified work email. Companies headquartered outside Los Angeles are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 554 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 27, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Appellate patent law firms by metro in the United States

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names appellate patent law firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many appellate patent law firms are there based in Los Angeles, United States?

RevenueBase identified 55 appellate patent law firms headquartered in Los Angeles, United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Irell & Manella LLP, headquartered in Los Angeles, tops this list with the largest team on record.

Which city in the United States has the most appellate patent law firms?

New York leads the United States with 91 headquartered companies, followed by Houston (79) and Chicago (65). Los Angeles has 55.

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 554 verified decision-maker contacts tracked across these 55 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 27, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.