Your brand and your inventions are worth more than you think.
Chicago is the third-largest IP market in the country, with a busy Northern District of Illinois IP docket and major patent prosecution practices. Whether you're filing a trademark, defending a patent in NDIL, licensing software, or fighting a counterfeiter, the firms below have the credentials to handle it.
These 10 Chicago firms span the full IP spectrum — patent, trademark, copyright, trade secret, licensing, anti-counterfeiting, and IP litigation.
How we picked these 10: We reviewed published verdicts and settlements, peer rankings (Best Lawyers, Super Lawyers, Chambers and Partners, Avvo), client review patterns, and bar association recognition. Firms that appeared consistently across independent sources made the list. We do not accept payment for placement, and we do not write sponsored reviews. More on our methodology →
Practice focus: Patent, trademark, copyright, anti-counterfeiting, IP litigation
Premier Chicago IP boutique. Strong anti-counterfeiting practice for major consumer brands. Multiple Best Lawyers.
Practice focus: Patent, biotech, life sciences, IP litigation
Premier Chicago patent firm. Strong life sciences/biotech practice. Chambers ranked.
Practice focus: Patent, trademark, copyright, IP litigation, life sciences
One of the largest dedicated Chicago IP firms. Multiple Chambers ranked attorneys.
Practice focus: Patent, trademark, IP litigation, life sciences
100+ year-old Chicago IP firm. Strong patent prosecution and litigation. Chambers ranked.
Practice focus: Patent, trademark, IP transactions, IP litigation
Top 10 most prolific patent firm in U.S. WTR 1000, IAM Patent 1000, Managing IP IP Stars.
Practice focus: Patent, IP litigation, trademark, life sciences
Founding partner Paul McAndrews recognized by Best Lawyers for patent law since 2025.
Practice focus: Patents, trademarks, trade dress, copyrights, IP
120+ years of Chicago IP practice. Multi-practice firm with strong IP transactional and enforcement bench.
Practice focus: Patent, trademark, copyright, trade secret
Theodore Chiacchio has 15+ years of IP practice. Strong individual + small-business client base.
Practice focus: Patent, trademark, software/electronics IP
Founder is an electrical and computer engineer turned patent attorney. Strong startup-tech practice.
Practice focus: Full-service IP for entrepreneurs, startups, and small businesses
Boutique focused on entrepreneurial businesses. Strong patent + trademark combined practice.
Tell us about your situation and we'll match you with vetted intellectual property attorneys in Chicago. Free, confidential, no obligation.
Request Free Consultation →Trademark filing: 8-14 months at the USPTO from filing to registration. Patent prosecution: 2-4 years. IP litigation in NDIL typically runs 18-36 months. Anti-counterfeiting work (Amazon takedowns, customs seizures, eBay/Etsy enforcement) is often weeks to months.
Chicago trademark filings: $1,200-$2,800 in legal fees plus USPTO fees ($350+/class). Patent prosecution: $8,000-$25,000+ depending on complexity. IP litigation is hourly + retainer; even modest patent cases run $250,000-$1M+ to verdict.
The legal directory you find on Google has thousands of Chicago intellectual property firms. Most are competent. A few are problematic. The patterns to avoid:
Guaranteed outcomes. No ethical attorney can guarantee a result. If a firm promises a specific recovery, dismissal, or visa approval, walk away.
The disappearing partner. You meet a senior partner at intake, then never speak to them again. The case is handled by an unsupervised junior or a paralegal. Ask in writing who will be your day-to-day attorney.
Pressure to sign immediately. Reputable firms give you the retainer in writing, time to read it, and the option to take it home. High-pressure intake is almost always a sign of a volume mill, not a craftsperson's practice.
No verifiable track record. The firm should be able to point to verdicts, settlements, peer rankings, or bar association recognition. "We've helped thousands of clients" is marketing copy. Specific numbers, named cases, and third-party rankings are evidence.
Vague fee terms. "Don't worry about cost" is a red flag. Every legitimate Chicago lawyer will give you a written engagement letter with the fee structure, what's covered, what triggers extra charges, and what happens if you fire them.
Most Chicago firms on this list offer a free initial consultation. Use it. Bring a list of questions and write down the answers. Compare across at least two firms before you sign.
Chicago is its own market. The procedure, the courts, and the strategy are city- and state-specific in ways that matter to your outcome.
Local courthouses matter. the Daley Center (Cook County Circuit Court) and the Northern District of Illinois have judges, calendars, and procedures that shape how cases move. A firm that knows the local courthouse has an advantage.
Filing deadlines are strict. Notice of Claim windows for cases against the City or County, Statute of Limitations periods, and pre-suit certification requirements vary by case type and are unforgiving. A missed deadline often means a lost case — full stop.
Local procedure rules matter. Each court has its own forms, motion practice, and judge preferences. The right Chicago firm will know not just the law, but the unwritten rules of the courthouse you'll be in.
Local plaintiffs/defendants do well in front of local juries. Verdict patterns vary by venue, and a trial-capable firm uses venue strategically.
If you sell anything — yes, almost always. Federal trademark registration gives you nationwide rights and a much stronger basis for enforcement.
Sometimes. Patents are a competitive moat for product companies, especially in life sciences, hardware, and technology. A patentability search ($1,200-$2,500) before filing is usually worth it.
Don't post on social media yet. Save the evidence. Call a trademark lawyer for a cease-and-desist letter. Most counterfeiters and infringers stop after a properly drafted letter.
Usually yes — if your employment agreement includes a proper IP assignment clause. The Illinois Employee Patent Act has narrow exceptions for inventions made on the employee's own time without employer resources.
Trademark protects brand identifiers. Copyright protects original creative works. Patent protects inventions or designs. Trade secret protects confidential business information.
One last thing. Choosing a lawyer is personal. Read the reviews. Call two or three firms before you sign. Ask each one: How many cases like mine have you taken to verdict in the last three years? The answer tells you everything. — The LawFirmSquare team