Av. William John Cassin

Av. William John Cassin

William John Cassin is a lawyer practicing intellectual property. William received a B.S. degree from University of Illinois at Urbana-Champaign in 2000, and has been licensed for 20 years.

Chicago Chicago 20 Yıl Deneyim 20 yıl
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Profile Summary

About William John Cassin at a glance

William John Cassin is an Associate based in Chicago, Illinois, practicing at Schiff Hardin LLP. They have 20+ years of legal experience, licensed to practice since 2006. Their practice focuses on ip. Admitted to practice in Illinois registered to practice before U.S. Patent and Trademark Office (2006). Educated at Loyola University Chicago School of Law (J.D., 2006) and University of Illinois at Urbana-Champaign (B.S. Mechanical, 2000). Serands clients in Chicago, IL and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

Hakkında

  • William John Cassin is a lawyer practicing intellectual property
  • William received a B.S. degree from University of Illinois at Urbana-Champaign in 2000, and has been licensed for 20 years
  • William practices at Schiff Hardin LLP in Chicago, IL

Practice Areas Explained

William John Cassin's Areas of Practice

Each practice area below reflects the types of cases William John Cassin handles, with a brief overview of what that area of law covers.

Intellectual Property

IP attorneys protect inventions, brands, and creative work through patent prosecution, trademark registration, copyright, and trade-secret enforcement.

William John Cassin is one of 106,079 ip attorneys indexed nationally. Browse ip attorneys in Illinois →

Jurisdictional Context

Why local counsel matters in Illinois

Practicing law in Illinois. Legal matters in Illinois are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Chicago are typically filed in the local municipal court or the appropriate Illinois state district court, depending on subject matter and amount in controversy. An attorney licensed in Illinois brings working knowledge of local procedural deadlines, judicial practices in this andnue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in Illinois courts without local counsel or pro hac vice admission.

Looking for additional Illinois attorneys? Browse all attorneys in Chicago or all attorneys in Illinois.

Frequently Asked

Common questions about William John Cassin

Where is William John Cassin's law office located?
William John Cassin's law practice is located in Chicago, Illinois. The firm is Schiff Hardin LLP. You can contact the office directly through this profile page.
What practice areas does William John Cassin handle?
William John Cassin focuses on ip. Each practice area listed reflects experience handling cases of that type in Illinois.
How long has William John Cassin practiced law?
William John Cassin has 20+ years of legal experience and has been licensed since 2006.
Where did William John Cassin go to law school?
William John Cassin earned their education at (J.D., 2006); (B.S. Mechanical, 2000).
How can I contact William John Cassin for a consultation?
You can contact William John Cassin directly through this profile page. Click "Ask the Attorney" to submit a question, or "Schedule a Consultation" to book a meeting. Most claimed-profile attorneys respond within one business day.

Uzmanlık Alanları

Eğitim

J.D.
Loyola University Chicago School of Law
- 2006
B.S. Mechanical
University of Illinois at Urbana-Champaign
- 2000

Bar Admissions

Illinois registered to practice before U.S. Patent and Trademark Office
Admitted: 2006

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