Atty. Mark Cromwell Johnson

Atty. Mark Cromwell Johnson

Mark Cromwell Johnson is a lawyer practicing patent application, commercial litigation, appellate practice and 6 other areas of law. Mark received a B.S.E. degree from Marquette University in 1996, and has been licensed for 26 years.

Cleveland Cleveland 26 J. Erfahrung 26 year
Call (330) 864-5550 Book Appointment

Profile Summary

About Mark Cromwell Johnson at a glance

Mark Cromwell Johnson is a Member based in Cleveland, Ohio, practforg at Renner, Otto, Boisselle & Sklar, LLP. They haand 26+ years of legal experience, licensed to practice since 2000. Admitted to practice in Ohio (2000) and U.S. District Court, Northern District of Ohio registered to practice before U.S. Patent and Tradema (2001). Educated at Case Western Reserve University (J.D., 2000) and Marquette University (B.S.E., 1996). Serands clients in Cleveland, OH and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

Über uns

  • Mark Cromwell Johnson is a lawyer practicing patent application, commercial litigation, appellate practice and 6 other areas of law
  • Mark received a B.S.E. degree from Marquette University in 1996, and has been licensed for 26 years
  • Mark practices at Renner, Otto, Boisselle & Sklar, LLP in Cleveland, OH

Jurisdictional Context

Why local counsel matters in Ohio

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

Looking for additional Ohio attorneys? Browse all attorneys in Cleveland or all attorneys in Ohio.

Frequently Asked

Common questions about Mark Cromwell Johnson

Where is Mark Cromwell Johnson's law office located?
Mark Cromwell Johnson's law practice is located in Cleveland, Ohio. The firm is Renner, Otto, Boisselle & Sklar, LLP. You can contact the office directly through this profile page.
How long has Mark Cromwell Johnson practiced law?
Mark Cromwell Johnson has 26+ years of legal experience and has been licensed since 2000.
Where did Mark Cromwell Johnson go to law school?
Mark Cromwell Johnson earned their education at (J.D., 2000); (B.S.E., 1996).
How can I contact Mark Cromwell Johnson for a consultation?
You can contact Mark Cromwell Johnson 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.

Education

J.D.
Case Western Reserve University
- 2000
B.S.E.
Marquette University
- 1996

Bar Admissions

Ohio
Admitted: 2000
U.S. District Court, Northern District of Ohio registered to practice before U.S. Patent and Tradema
Admitted: 2001

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