Atty. John Walter Kozak

Atty. John Walter Kozak

Mr. John Walter Kozak is a lawyer practicing licensing, litigation, patents and 4 other areas of law.

Chicago Chicago 58 yrs experience 58 year
Call (464) 245-3021 Book Appointment

Profile Summary

About John Walter Kozak at a glance

John Walter Kozak is a Member based in Chicago, Illinois, practicing at Leydig, Voit & Mayer, Ltd.. They have 58+ years of legal experience, licensed to practice since 1968. Their practice focuses on patent, ip, trade secrets, and litigation. Admitted to practice in Illinois (1968) and District of Columbia U.S. District Court, Northern District of Illinois, including Trial Bar U.S. Co (1969). Educated at Georgetown University (J.D., 1968) and University of Notre Dame (B.S.E.E., 1965). Recognitions include AV Preeminent. Serands clients in Chicago, IL and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Mr. John Walter Kozak is a lawyer practicing licensing, litigation, patents and 4 other areas of law
  • John received a B.S.E.E. degree from University of Notre Dame in 1965, and has been licensed for 58 years
  • John practices at Leydig, Voit & Mayer, Ltd. in Chicago, IL

Practice Areas Explained

John Walter Kozak's Areas of Practice

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

Patent Law

John Walter Kozak is one of 20,749 patent attorneys indexed nationally. Browse patent attorneys in Illinois →

Intellectual Property

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

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

Trade Secrets

John Walter Kozak is one of 6,644 trade secrets attorneys indexed nationally. Browse trade secrets attorneys in Illinois →

Civil Litigation

Civil litigation attorneys for breach of contract, business disputes, civil rights, and class action lawsuits.

John Walter Kozak is one of 454,532 litigation attorneys indexed nationally. Browse litigation 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 John Walter Kozak

Where is John Walter Kozak's law office located?
John Walter Kozak's law practice is located in Chicago, Illinois. The firm is Leydig, Voit & Mayer, Ltd.. You can contact the office directly through this profile page.
What practice areas does John Walter Kozak handle?
John Walter Kozak focuses on patent, ip, trade secrets, litigation. Each practice area listed reflects experience handling cases of that type in Illinois.
How long has John Walter Kozak practiced law?
John Walter Kozak has 58+ years of legal experience and has been licensed since 1968.
Where did John Walter Kozak go to law school?
John Walter Kozak earned their education at (J.D., 1968); (B.S.E.E., 1965).
How can I contact John Walter Kozak for a consultation?
You can contact John Walter Kozak 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.
What awards or recognition has John Walter Kozak received?
John Walter Kozak's notable recognition includes: AV Preeminent.

Education

J.D.
Georgetown University
- 1968
B.S.E.E.
University of Notre Dame
- 1965

Awards

AV Preeminent

Bar Admissions

Illinois
Admitted: 1968
District of Columbia U.S. District Court, Northern District of Illinois, including Trial Bar U.S. Co
Admitted: 1969

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