Ranking tables

Intellectual Property | USA

Illinois

Intellectual Property covers disputes related to patent, copyright and trademark infringement. Litigation concerning trade secrets also features. We also feature related issues such as licensing and IP commercialization (US patent prosecution).

Rankings overview for Departments

S

Senior Statespeople

  1. Michael O Warnecke
    Michael O Warnecke Perkins Coie LLP23 Years Ranked
  2. Bradford P LyerlaTabet DiVito & Rothstein LLC

All Departments profiles

1

Band 1

  1. Kirkland & Ellis
    1
    Kirkland & Ellis
    Intellectual Property
    2025 | Band 1 | 22 Years Ranked
    Kirkland & Ellis has an outstanding practice group known for its trial capabilities. The team regularly handles patent disputes in addition to its wider expertise bringing actions to enforce trademarks and trade secret rights. The firm's clients include some of the largest blue-chip companies active in the pharmaceutical, life sciences and technology sectors. The team can boast experienced counsel for Abbreviated New Drug Application (ANDA) litigation and has increasing presence in the growing biosimilars market. It is also noted for its adept handling of USPTO post-grant review proceedings.
  2. Sidley Austin LLP
    1
    Sidley Austin LLP
    Intellectual Property
    2025 | Band 1 | 22 Years Ranked

    Sidley Austin has a market-leading patent group often relied upon by brand-name pharmaceutical companies involved in Hatch-Waxman cases and global blue-chip companies on patent infringement litigation. The team has substantial experience acting in USPTO proceedings, handling a number of inter partes and post-grant review hearings. They have a significant presence in major technology patent infringement cases, with noted expertise assisting telecommunications clients in connection with fair, reasonable and non-discriminatory (FRAND) disputes regarding standard-essential patents.

2

Band 2

  1. DLA Piper LLP (US)
    2
    DLA Piper LLP (US)
    Intellectual Property
    2025 | Band 2 | 17 Years Ranked
    DLA Piper provides expert transactional, licensing and brand management support to household-name groups. The firm draws its clients from areas such as real estate, life sciences, the automotive sector and retail. The team is able to handle all aspects of IP work, including patents and work relating to global trademark portfolios, forming a full service offering which is bolstered by the firm's notable international capacity. In addition, the firm handles due diligence for corporate transactions and offers noted strength in infringement claims and contentious domain name matters.
  2. Latham & Watkins LLP
    2
    Latham & Watkins LLP
    Intellectual Property
    2025 | Band 2 | 8 Years Ranked
    Latham & Watkins is skilled in handling an array of IP matters, notably patent infringement, trademark infringement, trade secret and breach of contract disputes. The firm also provides portfolio management and intellectual property counseling to clients. The team is highlighted for particular experience in the life sciences sphere. It is also recognized for its expert representation of technology clients. The firm has an impressive experience in PTAB and ITC proceedings, and is able to draw on Chicago-based and firm-wide expertise.
  3. McDermott Will & Emery LLP
    2
    McDermott Will & Emery LLP
    Intellectual Property
    2025 | Band 2 | 21 Years Ranked
    McDermott Will & Emery advises on the full range of IP matters, with experts in areas including trademark, patent and copyright law. Services provided include portfolio management and development, as well as IP litigation. It has growing experience in Hatch-Waxman and ANDA litigation. The team is adept at handling matters at the ITC, PTAB and Federal Circuit proceedings, with areas of strength including infringement claims, inter partes reviews, misappropriation of trade secrets claims and inventorship disputes. The team also handles due diligence relating to corporate transactions.
  4. Morgan, Lewis & Bockius LLP
    2
    Morgan, Lewis & Bockius LLP
    Intellectual Property
    2025 | Band 2 | 6 Years Ranked
    Morgan, Lewis & Bockius has a reputable litigation practice with dedicated IP expertise. The firm regularly acts on big-ticket patent disputes, drawing on wider trial capabilities as well as notable experience in PTAB proceedings. The firm's practice includes disputes involving issues of patent validity and infringement. The team is also recognized for its handling of ITC investigations, global patent prosecution and portfolio management.
  5. Winston & Strawn LLP
    2
    Winston & Strawn LLP
    Intellectual Property
    2025 | Band 2 | 15 Years Ranked

    Winston & Strawn has a much-vaunted practice group known for its particular expertise representing clients in the technology, pharmaceutical and life sciences industries. Patent, trade secrets and trademark litigation form the core of the group's practice, with noted strength handling Hatch-Waxman disputes. It provides effective representation for Federal Circuit and ITC proceedings, and has notable experience before the Supreme Court representing blue-chip clients in major disputes.

3

Band 3

  1. ArentFox Schiff LLP
    3
    ArentFox Schiff LLP
    Intellectual Property
    2025 | Band 3 | 8 Years Ranked
    ArentFox Schiff is well regarded for its handling of patent infringement disputes, including the representation of generic pharmaceutical manufacturers in ANDA litigation. Other areas of strength include patent prosecution and licensing agreements. The team offers impressive full service capabilities to its roster of clients.
  2. Crowell & Moring LLP
    3
    Crowell & Moring LLP
    Intellectual Property
    2025 | Band 3 | 22 Years Ranked

    Crowell & Moring has a strong IP litigation practice known for its expertise in ITC Section 337 and USPTO proceedings, and is regularly engaged to assist with post-grant reviews. The firm routinely takes on cases across the IP spectrum, with specialists involved in trade secrets, trademark, copyright and patent infringement cases, among others. It has noted experience acting for life sciences companies in Hatch-Waxman disputes.

  3. Fitch, Even, Tabin & Flannery LLP
    3
    Fitch, Even, Tabin & Flannery LLP
    Intellectual Property
    2025 | Band 3 | 13 Years Ranked
    Fitch, Even, Tabin & Flannery has a strong reputation for work in contentious and noncontentious patent matters. The firm offers substantial experience handling post-grant, re-examination and inter partes reviews at the USPTO. It is often engaged to handle portfolio management, licensing transactions and prosecution needs.
  4. Jenner & Block LLP
    3
    Jenner & Block LLP
    Intellectual Property
    2025 | Band 3 | 21 Years Ranked
    Jenner & Block represents a diverse range of clients involved in the electronics, automotive, life sciences and energy sectors. Patent litigation remains a core practice area for the group, with recent work on ANDA and biosimilars cases as well as infringement claims and inventorship disputes. It has additional strengths in misuse of trade secrets allegations and licensing disputes, and offer extensive experience in appearing before the US PTAB and TTAB.
  5. Jones Day
    3
    Jones Day
    Intellectual Property
    2025 | Band 3 | 21 Years Ranked
    Jones Day is highly regarded for its work on patent disputes, with notable expertise representing branded pharmaceuticals in Hatch-Waxman litigation as well as technology cases involving hardware, software, internet-based systems and semiconductors. Its wider patent expertise extends to prosecution and PTAB proceedings including inter partes reviews.
  6. Mayer Brown LLP
    3
    Mayer Brown LLP
    Intellectual Property
    2025 | Band 3 | 22 Years Ranked
    Mayer Brown offers significant expertise in a range of IP matters including Hatch-Waxman litigation, post-grant reviews and domain name disputes. The team also advises on patent portfolio management needs and commercialization transactions. The team's work also extends to trademarks and trade dress disputes, brand management and licensing advisory. Extensive support is provided to clients, including those in the biotechnology and medical device industry spaces.
  7. Perkins Coie LLP
    3
    Perkins Coie LLP
    Intellectual Property
    2025 | Band 3 | 7 Years Ranked
    Perkins Coie is increasingly commended for its strength across patent and trademark matters, including disputes and portfolio management concerns. The firm attracts a broad client roster, including entities in the healthcare, technology and pharmaceutical sectors. The team's experience includes providing expert counsel on due diligence in relation to IP transactions and licensing matters.
  8. Willkie Farr & Gallagher LLP
    3
    Willkie Farr & Gallagher LLP
    Intellectual Property
    2025 | Band 3 | 4 Years Ranked
    Willkie Farr & Gallagher has a respected IP practice with strength in its litigation capabilities. The team regularly appears before the PTAB and represents clients in patent infringement matters and provides support for its clients on noncontentious issues.
  9. Rakoczy Molino Mazzochi Siwik LLP
    Intellectual Property
    2025 | Band 3
4

Band 4

  1. BakerHostetler LLP
    4
    BakerHostetler LLP
    Intellectual Property
    2025 | Band 4 | 5 Years Ranked
    BakerHostetler has a respected group with notable expertise in a wide range of complex patent matters. The team regularly advises clients in an array of sectors, including technology and food and beverages. The team is equally adept at representing clients in high-value litigation and noncontentious matters such as prosecution and portfolio management.
  2. Banner & Witcoff, Ltd
    4
    Banner & Witcoff, Ltd
    Intellectual Property
    2025 | Band 4 | 22 Years Ranked
    Banner & Witcoff is a well-regarded boutique known for advising a range of clients in sectors as varied as computer software and consumer products. The firm is proficient in handling design and business method patents, due diligence support on corporate transactions, and copyright, patent, trademark and trade secrets disputes. It provides seasoned representation for inter partes reviews at the PTAB and adept counsel for district court, federal court and ITC proceedings. The team is sought after for its advice on the management and protection of IP portfolios. Clients include multinational corporations in the retail and automotive sector, as well as financial institutions.
  3. Barnes & Thornburg LLP
    4
    Barnes & Thornburg LLP
    Intellectual Property
    2025 | Band 4 | 17 Years Ranked
    Barnes & Thornburg has a distinguished patent prosecution offering supplemented by expertise registering trademarks and managing and advising on IP portfolios across various jurisdictions. Its wider services include assistance with domain name disputes, protecting trade secrets, due diligence guidance for corporate transactions, patent infringement claims, clearance searches and licensing agreements.
  4. Bartlit Beck LLP
    4
    Bartlit Beck LLP
    Intellectual Property
    2025 | Band 4 | 7 Years Ranked
    Bartlit Beck is a well-regarded boutique noted for its expertise in handling a range of complex IP disputes including patent infringement and product liability litigation. The team offers additional skill across pharmaceutical and medical technology sector matters.
  5. Honigman LLP
    4
    Honigman LLP
    Intellectual Property
    2025 | Band 4 | 5 Years Ranked
    Honigman has a well-regarded IP group with substantial experience in high-stakes infringement disputes. The firm offers further capabilities in patent prosecution and portfolio management as well as trademarks assertions and oppositions. The team is particularly noted for its work with life sciences sector clients.
  6. 4
    McDonnell Boehnen Hulbert & Berghoff LLP
    Intellectual Property
    2025 | Band 4 | 22 Years Ranked

    McDonnell Boehnen Hulbert & Berghoff is a long-established boutique that regularly works on high value patent, copyright and trademark cases and offers recognized experience in PTAB proceedings. Its areas of strength include patent prosecution, managing IP portfolios and litigation. The team regularly works with clients in the biotechnology, electrical and software industries.

  7. Neal, Gerber & Eisenberg LLP
    4
    Neal, Gerber & Eisenberg LLP
    Intellectual Property
    2025 | Band 4 | 18 Years Ranked
    Neal, Gerber & Eisenberg offers a comprehensive service to large gaming, pharmaceutical and computer software clients. The firm is particularly strong on patent prosecution, as well as the management and protection of patent and trademark portfolios. The firm provides experienced representation for PTAB matters, with additional strength in patent, trademark and trade dress disputes.
  8. Quinn Emanuel Urquhart & Sullivan, LLP
    4
    Quinn Emanuel Urquhart & Sullivan, LLP
    Intellectual Property
    2025 | Band 4 | 3 Years Ranked
    Quinn Emanuel Urquhart & Sullivan is a renowned litigation shop with substantial prowess in IP disputes. The team is frequently called upon by household name technology companies to litigate high-stakes patent infringement matters and ITC proceedings.
  9. Taft
    4
    Taft
    Intellectual Property
    2025 | Band 4 | 7 Years Ranked

    Taft has a disputes-focused patent group with significant expertise in advising pharmaceutical and life sciences companies involved in high-stakes litigation. The firm offers considerable experience in Hatch-Waxman litigation and IPR proceedings.

  10. McAndrews, Held & Malloy, Ltd
    Intellectual Property
    2025 | Band 4
5

Band 5

  1. 5
    AddyHart P.C.
    Intellectual Property
    2025 | Band 5 | 1 Years Ranked

    AddyHart is renowned for its handling of complex intellectual property litigation matters for clients from a range of industries including technology, pharmaceutical and manufacturing. The team is extremely adept at handling Hatch-Waxman cases. It is also a go-to firm for clients seeking advice on patent prosecution and trademark work. Lawyers at AddyHart regularly appear before the PTAB and Court of Federal Claims, as well as Federal district courts.

  2. Faegre Drinker
    5
    Faegre Drinker
    Intellectual Property
    2025 | Band 5 | 5 Years Ranked

    Faegre Drinker has a solid intellectual property practice able to adeptly handle contentious and non-contentious cases. The team has experience of acting in patent litigation and prosecution matters, and supporting clients from such industries as technology and pharmaceuticals, in the management of their patent portfolios.

  3. Green, Griffith & Associates LLP
    5
    Green, Griffith & Associates LLP
    Intellectual Property
    2025 | Band 5 | 1 Years Ranked

    Green, Griffith & Associates is a strong intellectual property firm able to offer a full range of service to clients from a range of industries. The lawyers have experience in contentious cases including Hatch-Waxman disputes as well as non-contentious issues such as patent management. It also offers strength in appellate cases. The team is also well-versed in trade secret matters.

  4. Irwin IP LLP
    5
    Irwin IP LLP
    Intellectual Property
    2025 | Band 5 | 1 Years Ranked

    Irwin IP is an intellectual property boutique that offers clients strength in a wide range of matters including litigation involving patent infringement claims, inter partes and post grant reviews. The team has in-depth expertise in copyright and trademark matters. The lawyers are also well placed to be able to provide advice on transactional issues.

  5. K&L Gates
    5
    K&L Gates
    Intellectual Property
    2025 | Band 5 | 2 Years Ranked
    K&L Gates is a notable intellectual property firm that represents clients across different areas of IP. The team has expertise in patent prosecution, litigation, trademark filings and trade secret misappropriation disputes, amongst other matters.
  6. Loeb & Loeb LLP
    5
    Loeb & Loeb LLP
    Intellectual Property
    2025 | Band 5 | 11 Years Ranked

    Loeb & Loeb LLP has a well-respected group with a strong presence in both contentious and transactional IP mandates. The team advises on patent portfolios and prosecution matters, as well as trademark infringement disputes before the PTAB and state and federal courts. The team also provides expert counsel on branding issues and represents hotel and leisure companies, clients in the transport industry and those working with automobile technology.

  7. Michael Best & Friedrich LLP
    5
    Michael Best & Friedrich LLP
    Intellectual Property
    2025 | Band 5 | 7 Years Ranked
    Michael Best & Friedrich can boast a broad intellectual property practice. The firm handles patent prosecution, litigation and portfolio management. Its capabilities also extend to trademark prosecution and clearance. The team is experienced in handling IP transactions and providing strategic counseling to its clients.
  8. Paul Hastings LLP
    5
    Paul Hastings LLP
    Intellectual Property
    2025 | Band 5 | 1 Years Ranked

    Paul Hastings has a very well-experienced team of intellectual property lawyers that has a particular strength in guiding high profile technology clients through complex patent infringement litigation. The team also has a wide knowledge of trademark and trade secret disputes and management. Its lawyers are very adept at handling matters involving multiple jurisdictions.

  9. Polsinelli PC
    5
    Polsinelli PC
    Intellectual Property
    2025 | Band 5 | 1 Years Ranked

    Polsinelli's intellectual property practice is regularly sought by clients from the tech and pharma industries to handle complex patent and trademark matters. Its lawyers are extremely well-versed in Hatch-Waxman disputes. The team has experience acting in patent and trademark infringement litigation, as well as noncontentious matters such patent prosecution.

  10. Steptoe LLP
    5
    Steptoe LLP
    Intellectual Property
    2025 | Band 5 | 6 Years Ranked

    Steptoe is a highly regarded intellectual property practice. The team is able to handle a wide array of contentious and non-contentious matters including patent litigation, Trade Secret Act disputes and patent applications. The lawyers bring extensive engineering backgrounds to the table to provide in-depth advice to clients from numerous industries such as tech and pharma. The firm has vast experience appearing before the PTAB, ITC and US Court of Appeals for the Federal Districts.

  11. Leydig, Voit & Mayer, Ltd
    Intellectual Property
    2025 | Band 5
  12. Marshall, Gerstein & Borun LLP
    Intellectual Property
    2025 | Band 5