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About me

For over 35 years now John R. Crossan has helped businesses,
institutions, and individuals thrive and compete successfully with
services provided by his specialized practice of Intellectual Property
Law - shortened as IP Law. John R. Crossan has, with his clients,
obtained and enforced or protected against patents, trademarks,
copyrights, and trade secrets, and John R. Crossan has helped clients
understand and use employment covenants and IP-related antitrust law.
He has done this through litigation in Federal and state courts and
other dispute resolution forums, here and abroad, through preparing and
prosecuting applications, by negotiations and licensing, and through
counseling of clients of all sizes.


Practice areas


  1. Litigation: 35%
    43 years, 100 cases
  2. Intellectual Property: 25%
    43 years, 1 thousand cases
  3. Copyright: 10%
    43 years, 20 cases
  4. Trademark: 10%
    43 years, 60 cases
  5. Other: 20%
  6. More 



Hourly ($200-400/hour)

Payment types:

Cash, Check, Credit card

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Contact info

Crossan Intellectual Property Law, LLC

875 N Michigan Ave., #3216
Chicago, IL, 60611-1960


ILActive And Authorized To Practice Law197411/12/2015
We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Illinois Super Lawyer in IP LitigationIllinois Super Lawyers2006
Illinois Leading Lawyer in Intellectual Property LawLeading Lawyers Network2005
Who's Who in the World, America, American Business, American LawMarquis Who's Who1990
AV Rating for professional ability and ethicsMartindale Hubble Law Directory1985
Work experience
TitleCompany nameDuration
Founder and Sole MemberCrossan Intellectual Property Law, LLC2009 - Present
PartnerCHAPMAN AND CUTLER LLP1998 - 2009
Counsel, then ShareholderBRINKS HOFER GILSON & LIONE1989 - 1997
Associate, then partnerCOOK WETZEL & EGAN, LTD.1978 - 1988
AssociateHILL GROSS SIMPSON VAN SANTEN et al.1974 - 1978
Association namePosition nameDuration
Intellectual Property Law Association of Chicago, Litigation CommitteeChair2009 - 2011
American Intellectual Property Law AssociationMember1980 - Present
American Counsel AssociationMember, Board1980 - 1988
American Bar AssociationLitigation, IP Sections1974 - Present
Chicago Bar AssociationPatent, Trademark Law Committees1974 - 2011
Intellectual Property Law Association of ChicagoMember1974 - Present
Legal cases
Case nameOutcome
VAE Nortrak v. Progress RailSummary Judgment entered
Sun Mountain Sports v Clover SportsCase dismissed
Stoller v Ford Motor CompanySummary Judgmnt for Def entered, reversed, settled
See all legal cases 
Publication nameTitleDate
Claim Construction in the Federal Circuit, 2010Contributor2011
Claim Construction in the Federal Circuit CourtContributor2009
Claim Construction in the Federal Circuit CourtContributor2008
Claim Construction in the Federal Circuit CourtContributor2007
Self-Help Guide to Intellectual Property ProtectionSelf-Help Guide2000
Willian Brinks 75th Anniversary SeminarSummary Judgment as a Case Management Tool1992
School nameMajorDegreeGraduated
University of Chicago Law SchoolLawJD - Juris Doctor1973
University of VirginiaEngineering ScienceBS - Bachelor of Science1969