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Mark E. Wiemelt

Mark E. Wiemelt

Practice areas:

Intellectual Property, Patent Infringement, Trademark Infringement, Trademark Application, Copyright Infringement

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About Me

CONFIDENTIAL FREE INITIAL CONSULTATIONS   by Chicago patent attorneys, trademark lawyers and ip trial lawyers with an international practice focused on patents, trademarks, copyrights, life science, FDA, Hatch-Waxman, pharma & generic drugs, trade secrets, Lanham Act, unfair competition, false advertising, false patent marking, Internet, domain name, e-commerce, technology, licensing and computer law matters, including prosecution, enforcement and litigation by experienced and technically trained intellectual property lawyers.  Alternative billing arrangements, such as flat fee billing, flat rate billing, hybrid billing, and contingency or contingent fee arrangements, are available for many matters.


Our intellectual property law firm was ranked among the "TOP PATENT FIRMS" in the U.S. in the March 2013, February 2012 and March, 2010 issues of Intellectual Property Today, a monthly publication focused on legal issues in patent, trademark and copyright law.  Our IP law firm was also ranked among the "TOP TRADEMARK FIRMS" in the U.S. in the May 2013, May 2012, May 2011, May 2010 and May 2009 issues of Intellectual Property Today.


Photos and Videos

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Practice Areas

Licensed since 1991

  1. Intellectual Property: 21%
    24 years, 2.5 thousand cases
  2. Trademark Application: 20%
    24 years, 1 thousand cases
  3. Trademark Infringement: 20%
    24 years, 1.2 thousand cases
  4. Patent Infringement: 20%
    24 years, 120 cases
  5. Copyright Infringement: 19%
    24 years, 120 cases



Free Consultation (15 minutes)

Payment Types:

Check, Credit Card

Attorney Endorsements

4 total 

  • Martin Elias Jerisat

    I endorse this lawyer's work. I have seen his work in patent and trademark litigation cases for several years. Mark is an outstanding lawyer by any standard.


    Martin Jerisat Litigation Attorney
    Relationship: Worked together on matter

  • No photo

    I have worked with Mark for seven years, both in private practice and now as General Counsel for a pharmaceutical company that is a purchaser of legal services. In private practice, I know Mark to be a level-headed, solution-driven attorney. As company counsel, I have hired Mark to handle several complex intellectual property law matters, and sought his counsel on issues important to the Company. I, and the company's principals, have been very happy with Mark's work, the resolution of the matters, and the soundness of his counsel. I also know of no other attorney as adept in obtaining insurance coverage where others have given up. Without reservation, I can endorse Mark.


    Robert Knechtel
    Relationship: Worked together on matter

Contact Info

Wiemelt Knechtel

10 S. LaSalle St., Ste. 3300
Chicago, IL, 60603

Wiemelt Knechtel

5389 Paw Paw Lake Rd.
Coloma, MI, 49038

Wiemelt Knechtel

845 S. Spring Ave.
LaGrange, IL, 60525

Wiemelt Knechtel

15849 N. 71st Street
Suite 100
Scottsdale, AZ, 85254



AZActive 201103/20/2015
MIActive And In Good Standing201003/27/2015
ILActive And Authorized To Practice Law199105/14/2015

Professional Misconduct

We have not found any instances of professional misconduct for this lawyer.
Avvo Contributions
Legal Answers
Award NameGrantorDate Granted
TPO TRADEMARK FIRMS IN U.S.Intellectual Property Today2014
TOP PATENT FIRMS IN U.S.Intellectual Property Today2013
TOP TRADEMARK FIRMS IN U.S.Intellectual Property Today2013
TOP TRADEMARK FIRMS IN U.S.Intellectual Property Today2012
TOP PATENT FIRMS IN U.S.Intellectual Property Today2012
TOP TRADEMARK FIRMS IN U.S.Intellectual Property Today2011
TOP TRADEMARK FIRMS IN U.S.Intellectual Property Today2010
TOP PATENT FIRMS IN U.S.Intellectual Property Today2010
TOP TRADEMARK FIRMS IN U.S.Intellectual Property Today2009
Dean's ListSouthern Illinois University School of Law1988
American Jurisprudence AwardLawyers Cooperative Publishing1988

Work Experience
TitleCompany NameDuration
Founder/Managing AttorneyWiemelt Knechtel1995 - Present
Founder/PrincipalCalvo & Wiemelt1993 - 1995
Registered Patent AttorneyRochford & Associates1991 - 1993

Association NamePosition NameDuration
Federal Circuit Bar AssociationMember2005 - Present
DuPage County Bar AssociationMember2003 - Present
American Intellectual Property Lawyers AssociationMember2000 - Present
American Bar AssociationMember1993 - Present
Federal Trial Bar of the United States District Court for the Northern District of IllinoisMember1993 - Present
Chicago Bar AssociationMember1993 - Present
Peoria County Bar AssociationMember1991 - Present
Illinois State Bar AssociationMember1991 - Present
American Society of Mechanical EngineersMember1983 - Present

Legal Cases
Case NameOutcome
ALBION LABORATORIES, INC., BRECKENRIDGE PHARMACEUTICALS, INC., et al v. PRUGEN, INC. (USDC, Dist. of Utah)Obtained confidential settlement and dismissal of lawsuit with prejudice.
PHUSION PROJECTS, LLC v. UNITED BRANDS COMPANY, INC. (USDC, N.D. IL)Obtained confidential settlement and dismissal of lawsuit with prejudice.
DESTON THERAPEUTICS, L.L.C. v. PRUGEN, INC. and TWO LABS MARKETING, L.L.C. (USDC, M.D. N.C.)Obtained confidential settlement and dismissal of lawsuit with prejudice.

See all Legal Cases 

Publication NameTitleDate
Corporation, Securities & Business Law ForumInsurance Coverage for Patent, Trademark and Copyright Infringement Claims1997
Illinois State Bar Association - Corporation, Securities & Business Law ForumMalpractice Made Simple: Trademark Pitfalls for the Business Lawyer1997

School NameMajorDegreeGraduated
Harvard University Law SchoolCopyright LawGraduate of CopyrightX2014
Southern Illinois University School of LawLawJuris Doctor1991
Bradley UniversityMechanical EngineeringBS - Bachelor of Science1987

Speaking Engagements
Conference NameTitleDate
Career DayPatent Law1993
Bradley University Pre-Law ConferenceLaw as a career1992