Company lists · Data refreshed September 2026

Top 25 Patent litigation law firms based in Los Angeles, United States

Name: Patent litigation 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 29, 2026 106 companies tracked

RevenueBase identified 106 patent litigation law firms headquartered in Los Angeles, United States as of September 2026 and tracks 1,964 professional contacts across them, including 966 with verified work emails. Across the United States, New York is the largest hub for this category (206 companies); Los Angeles has 106.

This list covers patent litigation 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 29, 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 29, 2026 86% judged on-target in blind review

106Companies

1,964Contacts tracked

966Verified emails

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

Ranked by team size

Top 25 of 106 patent litigation law firms based in Los Angeles, United States, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to patent litigation 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	Strong evidence	Los Angeles, CA, United StatesHQ checked Sep 29, 2026	201-500	258 contacts →
	Strong evidence “Irell & Manella LLP is a law firm focused on complex commercial and IP litigation.” Source: RevenueBase Database · checked Sep 29, 2026
2	Glaser Weil	Strong evidence	Los Angeles, CA, United StatesHQ checked Sep 29, 2026	51-200	172 contacts →
	Strong 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 29, 2026
3	Hueston Hennigan LLP	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 29, 2026	51-200	121 contacts →
	Partial evidence “Hueston Hennigan LLP is a trial law firm focusing on high-stakes business disputes and white collar criminal defense.” Source: RevenueBase Database · checked Sep 29, 2026
4	Russ, August & Kabat	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 29, 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 29, 2026
5	Theodora Oringher PC	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 29, 2026	51-200	71 contacts →
	Indirect evidence “Theodora Oringher is a legal powerhouse in Los Angeles and Orange County.” Source: RevenueBase Database · checked Sep 29, 2026
6	Ellis George LLP	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 29, 2026	51-200	71 contacts →
	Partial 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 29, 2026
7	Miller Barondess, LLP	Strong evidence	Los Angeles, CA, United StatesHQ checked Sep 29, 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 29, 2026
8	Larson LLP	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 29, 2026	51-200	69 contacts →
	Partial evidence “Larson is an elite litigation firm committed to achieving success in any courtroom.” Source: RevenueBase Database · checked Sep 29, 2026
9	Hill, Farrer & Burrill LLP	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 29, 2026	51-200	67 contacts →
	Indirect evidence “Hill Farrer attorneys have successfully handled thousands of transactions and won thousands of cases.” Source: RevenueBase Database · checked Sep 29, 2026
10	King, Holmes, Paterno & Soriano, LLP	Strong evidence	Los Angeles, CA, United StatesHQ checked Sep 29, 2026	11-50	56 contacts →
	Strong evidence “The attorneys at King, Holmes, Paterno & Soriano, LLP provide innovative thinking, cutting edge deal making and powerful litigation and business strategies to our clients.” Source: RevenueBase Database · checked Sep 29, 2026
11	Frost LLP	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 29, 2026	51-200	47 contacts →
	Partial evidence “We are a litigation-driven firm built for efficiency–melding legal strategy, discipline, and business advice to achieve positive outcomes for our clients.” Source: RevenueBase Database · checked Sep 29, 2026
12	LTL Attorneys LLP	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 29, 2026	51-200	29 contacts →
	Partial evidence “Trusted by general counsel of leading global companies, our highly skilled lawyers focus solely on trials and litigation.” Source: RevenueBase Database · checked Sep 29, 2026
13	DTO LAW	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 29, 2026	11-50	28 contacts →
	Partial evidence “Founded by former Big Law attorneys, DTO Law is an elite boutique with offices in Los Angeles, Silicon Valley, and New York, though our attorneys handle cases and matters across…” Source: RevenueBase Database · checked Sep 29, 2026
14	Kibler Fowler & Cave LLP	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 29, 2026	11-50	28 contacts →
	Partial 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 29, 2026
15	Waymaker LLP	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 29, 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 29, 2026
16	Kubota & Basol LLP	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 29, 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 29, 2026
17	Willenken LLP	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 29, 2026	11-50	19 contacts →
	Partial evidence “Willenken is a premier boutique litigation firm renowned for our attorneys’ formidable trial capabilities and innovative strategic acumen.” Source: RevenueBase Database · checked Sep 29, 2026
18	Valle Makoff LLP	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 29, 2026	11-50	19 contacts →
	Partial evidence “Valle Makoff LLP provides business litigation and related transactional advice to corporate, fiduciary and individual clients in federal and state courts, arbitrations and in…” Source: RevenueBase Database · checked Sep 29, 2026
19	Park Lawless & Tremonti LLP	Strong evidence	Los Angeles, CA, United StatesHQ checked Sep 29, 2026	11-50	17 contacts →
	Strong evidence “With more than a century of combined experience at some of the preeminent Am Law 50 international law firms, our lawyers bring extensive experience in complex litigation and…” Source: RevenueBase Database · checked Sep 29, 2026
20	Cypress LLP	Strong evidence	Los Angeles, CA, United StatesHQ checked Sep 29, 2026	11-50	13 contacts →
	Strong evidence “An innovative law firm serving companies and entrepreneurs in litigation and trials, intellectual property, M&A, and finance.” Source: RevenueBase Database · checked Sep 29, 2026
21	Geragos & Geragos, APC	Strong evidence	Los Angeles, United StatesHQ checked Sep 29, 2026	11-50	13 contacts →
	Strong evidence “Geragos & Geragos, APC, is a boutique law firm focusing on complex civil litigation and criminal defense, with offices in downtown Los Angeles and New York.” Source: RevenueBase Database · checked Sep 29, 2026
22	Manning, Leaver, Bruder & Berberich, LLP	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 29, 2026	11-50	12 contacts →
	Indirect evidence “We at Manning, Leaver, Bruder & Berberich, LLP are proud that for over 95 years our clients have trusted us to help them with their legal needs.” Source: RevenueBase Database · checked Sep 29, 2026
23	Isaacs Friedberg Zill LLP	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 29, 2026	11-50	12 contacts →
	Indirect evidence “Founding partners Jeff Isaacs and Jerry Friedberg are former Assistant U.S.” Source: RevenueBase Database · checked Sep 29, 2026
24	MSD Lawyers	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 29, 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 29, 2026
25	Ruttenberg IP Law, A Professional Corporation	Strong evidence	Los Angeles, CA, United StatesHQ checked Sep 29, 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 29, 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: patent litigation 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 patent litigation law firms.
Partial evidence: Its own public description names part of patent litigation law firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name patent litigation 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 106 patent litigation law firms based in Los Angeles, United States

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Patent litigation law firms based in Los Angeles, United States at a glance

As of Sep 29, 2026

49.2%Verified-email coverage

18.5Average contacts per company

1-10Median size (employees)

Sep 29, 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 106 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 patent litigation 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 “patent litigation 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 patent litigation 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 patent litigation 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, 966 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 29, 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.

Patent litigation 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 patent litigation 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 patent litigation law firms are there based in Los Angeles, United States?

RevenueBase identified 106 patent litigation 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 patent litigation law firms?

New York leads the United States with 206 headquartered companies, followed by Houston (124) and Chicago (123). Los Angeles has 106.

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 966 verified decision-maker contacts tracked across these 106 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 29, 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.