Slater Matsil, LLP

About

Provided by Slater Matsil, LLP

USA

Managing Partner: Ira S. Matsil

Senior Partners: Steven H. Slater, Ira S. Matsil, Srini Chakravarthi

Number of partners: 12

Number of billing professionals: 26 attorneys, 6 patent agents, and 6 technical advisors

Languages: Arabic, Bangla, English, Farsi, French (Canadian), French (European), Georgian, German, Gujarati, Hindi, Italian, Kiswahili, Korean, Mandarin, Romanian, Russian, Spanish, Tamil, Urdu

Firm Overview

Slater Matsil is best known as one of the top patent prosecution firms in the US, consistently ranking amongst the most productive practices in the country. Slater Matsil was ranked in Best Performing Law Firms Overall, Overall Best Performing Law Firms in High-Tech and Most Active Law Firms in High-Tech by Patexia in 2025. In addition, PatentBots named Slater Matsil in the top 10 for patent quality and the Harrity Analytics Team named the Firm as a Top Patent Firm based on the total number of US utility patents that issued in 2024. The Firm has obtained over 23,000 US patents for clients, including some of the most patent-prolific companies in the world. Slater Matsil's team includes patent and trademark attorneys, patent agents, and technical advisors. Many of the Firm's patent attorneys are also experienced trial lawyers who handle cases in the US Federal Courts, before the Patent Trial and Appeal Board of the US Patent and Trademark Office, and before the United States International Trade Commission, often in partnership with other firms.

Slater Matsil’s clients include some of the world’s largest electronics and telecommunications companies and numerous up-and-coming start-up ventures

Main Areas of Practice

Patent Prosecution

■ Drafting and prosecuting patent applications is the core of Slater Matsil’s practice. The Firm manages a significant portion of US filings for some of the world’s most prolific patent filers, including several clients that are amongst the top 20 US filers

■ In 2024, Slater Matsil filed over 3,200 patent applications and had almost 2,000 patents issued on behalf of its clients

■ The Firm’s focus on quality as well as quantity is also recognized frequently by industry groups [Recognized by Patexia as a "Best Performing Patent Firm" in 2025; PatentBots as a Top 10 Large Firm in 2025 Patent Quality; The U.S. News - Best Lawyers® - Best Law Firm" named Slater Matsil as a Tier 1 firm in Litigation - Patent and a Tier 2 Firm in Patent Law (Dallas/Fort Worth) in 2023-2025; and ranked first in Juristat's 2024 "Top Patent Firms in Semiconductors, Electrical and Optical Systems, and Components" as well as first in total applications filed]

■ Slater Matsil recognizes that technical expertise is as important as legal prowess when it comes to effective patent drafting and prosecution. The Firm practices its motto, “Fluent in Technology, Proven in Law” every day – with thirteen of the Firms’ practitioners having an advanced technical degree. In fact, many Firm practitioners are inventors in their own rights, with over 125 patents issued to members of the Firm

Key Clients:

Taiwan Semiconductor Manufacturing Co.

Huawei Technologies

ST Microelectronics, Inc.

Contacts:

Ira S. Matsil

Tel: 972.732.1001

Email:[email protected]

Steven H. Slater

Tel: 972.732.1001

Email: [email protected]

Srini Chakravarthi

Tel: 972.732.1001

Email: [email protected]

Patent Litigation & Post Grant Challenges

■ The Firm offers a wide spectrum of expertise in IP litigation, often as a team member of a multi-firm effort. Frequently, the Firm’s involvement is due to a client’s request, but often other law firms engage Slater Matsil directly for specialized support such as pre-litigation assessments, claim construction briefing and hearings, developing invalidity defences, expert witness discovery, and the like

■ In post grant challenges, Slater Matsil represents both patent owners and petitioners, with dozens of post-grant challenges being successfully concluded on behalf of our clients. By combining extensive familiarity with Patent Office proceedings with strong litigation skill-sets, the Firm continues to rack up an impressive record of victories for its clients

■ The Firm's IP litigation team is nationally recognized [U.S. News ranked Slater Matsil in 2023-2025 as a "Best Law Firm in Tier 1 for Patent Litigation"]

Key Clients:

Taiwan Semiconductor Manufacturing Co., Ltd. (“TSMC”)

SMA Solar Technology AG

Contacts:

Steven H. Slater

Tel: 972.732.1001

Email:[email protected]

John D. Koetter

Tel: 972.732.1001

Email:[email protected]

Michael Kucher

Tel: 972.732.1001

Email:[email protected]

Asia Pacific Practice Group

■ Slater Matsil’s Asia Pacific Practice Group recognizes the importance of a comprehensive IP strategy for companies seeking to enter or grow in the US market. In addition to traditional IP services (patent preparation and prosecution, portfolio management, litigation, and the like), the Firm also provides practical, culturally-sensitive advice to companies seeking to navigate the complex landscape of business practices and intellectual property law in the United States. This practice group offers fluency in Mandarin, Bangla, Farsi, Gujarati, Hindi, Tamil, and Urdu

■ Slater Matsil was named the 2024 US Patent Prosecution Adviser of the Year for China - USA by IE 100 Awards

Key Clients:

Huawei Technologies

Hyundai Motor Group

Tokyo Electron Limited

Contacts:

Ira S. Matsil

Tel: 972.732.1001

Email: [email protected]

Elizabeth Iglesias

Tel: 972.732.1001

Email: [email protected]