Our Team

Our lawyers serve clients in Lebanon, Beavercreek, Warren County, Montgomery County, Butler County, Greene County, and all of southwest OH.

Dearie, Fischer & Mathews LLC

Meet Our Experienced Attorneys

Our attorneys are unmatched in their credentials.  Here is just a sampling of the qualifications and experience that shape the top notch service they offer their clients:
▪ degrees from the finest universities  ▪  experience in law firms large and small ▪  clerkships with Federal District Court judges ▪  experience before the Ohio Supreme Court  ▪  a position on teaching staff in local university  ▪ community volunteer positions  ▪ public service ▪ decades of courtroom litigation experience.

John A. Fischer


John Fischer practices in the area of civil and criminal litigation, focusing on criminal defense and  business, and consumer litigation. Licensed in Ohio since 1997, John has extensive experience in handling complex litigation for individuals and businesses. He has litigated a wide variety of matters, including criminal and traffic issues, consumer debt and credit report litigation, employment issues, breach of contract matters, and complex class actions. 

In addition to his law practice, John serves as an adjunct professor of law at the University of Dayton School of Law. He has taught classes in appellate advocacy, alternative dispute resolution, transactional drafting, and law practice management.

John graduated from OSU in 1997 with honors in law. While at OSU, he earned the Joseph M. Harter Memorial Trial Advocacy Award. John also served as a legal extern to Chief Justice Thomas Moyer of the Ohio Supreme Court and Judge James Cannon of the Dayton Municipal Court. During his first year of law school, John studied at the New York Law School in New York City, receiving the John M. Regan, Jr. Merit Scholarship, and ranking 14th in a class of 212. 

Following graduation from the Ohio State University College of Law, John worked for two years as a staff attorney at the Ninth District Court of Appeals in Akron, Ohio, for Judges Clair Dickinson and Beth Whitmore. 

As part of Dearie, Fischer & Mathews’ commitment to the community, John has served as Chair of the Board of Directors of Elizabeth’s New Life Center. John also served for nearly ten years as a reader for the Ohio State Bar Examination, and he has been a legal advisor to a local high school mock trial team.

John is also an active runner. He has completed four marathons, including the 2008 Columbus Marathon, where he achieved a Boston Marathon qualifying time. 



  • Partner, Dearie, Fischer & Mathews LLC. 2016 – Present.
  • Partner, Dearie, Fischer & Dame LLC. 2014 – 2016.
  • Partner, Dearie & Fischer LLC. 2011 – 2014.
  • Adjunct Professor, University of Dayton College of Law, 2008 - Present.
  • Associate, Faruki Ireland Cox Rhinehart & Dusing PLL. 1999 – 2010.
  • Ohio State Bar Examination Grader, Ohio Supreme Court, 1998 - 2007
  • Staff Attorney, Judges Clair Dickinson and Beth Whitmore of the Ninth District Court of Appeals 1997-1999


  • The Ohio State University Moritz College of Law, Columbus, OH. Juris Doctor, Cum Laude, 1997.
  • Joseph M. Harter Memorial Trial Advocacy Award
    · Legal extern, Chief Justice Thomas Moyer of the Ohio Supreme Court and
                                              Judge James Cannon of the Dayton Municipal Court


  • New York Law School, 1994-995.

              John M. Regan, Jr. Merit Scholarship

Ranked 14th in a class of 212


  • Wright State University, Bachelor of Arts in Journalism, 1993.


  • John A. Fischer on Honeywell Int'l, Inc. v. Universal Avionics Sys. Corp. and the Public Use Bar of 35 U.S.C. 102(b),
    Dec. 1, 2007, LexisNexis Expert Commentaries

In 2007, the Federal Circuit affirmed a judgment refusing to invalidate patents on aviation terrain warning systems under the public use bar of 35 U.S.C. Section 102(b), agreeing with the court below that the use at issue was a non-invalidating, experimental use. With this ruling, John A. Fischer explores the public use/experimental use distinction relied upon by the Court and offers guidelines for practitioners advising clients concerning the best practices to implement during the invention development process to reduce the risk that a patent may be invalidated under the public use bar.

Community Involvement           

  • Elizabeth’s New Life Center Board of Directors, 2007 – 2011.
                                   Chair, Board of Directors – 2009 - 2011
                            Vice Chair, Board of Directors – 2008 - 2009
  • Ohio State Bar Examination Grader, Ohio Supreme Court, 1998 - 2007
  • Legal Adviser to Local high school Mock Trial Team


Recent blog posts

              Sealing Your Record – Past Criminal Cases Don’t Have to Haunt You.  April 2017.




John Fischer DUI/Traffic Defense; Civil Litigation; Criminal Defense; Business Law; Beavercreek & Dayton


Dayton-Area Office




Email: john@dfm-law.comemail

Practice Areas:

  • Civil Litigation
  • Consumer Litigation
  • Criminal Defense
  • DUI/Traffic Defense
  • Business Law

Browse our lawyers’ profiles to learn how each one has formed his or her career to be able to offer the highest quality client service in Lebanon, Beavercreek, and all of southwest Ohio.