Meet Our Team

Cahn & Samuels, LLP is a small, technology based intellectual property boutique that places a strong emphasis on our clients by taking a proactive approach to the attorney-client relationship. We emphasize cost effective and timely service to our clients. Our goal is to provide our clients with full intellectual property services, including counseling, acquisition, and enforcement.

Maurice U.
Cahn

Frederick N.
Samuels

George A.
Metzenthin

Warren A.
Zitlau

Jonathan (Jon) W.
Parthum

Caroline
Mrohs

Email: maurice.cahn@cahnsamuels.com

 

Admissions

  • Registered to practice before the US Patent & Trademark Office
  • U.S. Supreme Court, U.S. Court of Appeals for the Federal Circuit
  • U.S. Court of Appeals for the Fourth Circuit
  • U.S. Court of Appeals for the Seventh Circuit
  • U.S. District Court for the District of Maryland
  • U.S. District Court for the District of Columbia
  • U.S. District Court for the Eastern District of Michigan
  • Courts of the State of Maryland and District of Columbia

 

Education

  • J.D., Catholic University, Columbus School of Law
  • M.S., Organic Chemistry, Lehigh University
  • B.S., Chemistry, Lehigh University

 

Maurice U. Cahn is a partner with the firm and has more than thirty years of experience in the intellectual property field.  He earned his Juris Doctor from Catholic University of America Columbus School of Law and received both his Bachelor's and Master's Degrees in Chemistry from Lehigh University where his graduate research was in the field of organic radioimmunoassay techniques.  He was published in the Journal of Heterocyclic Chemistry (The 1,3,4-Oxadiazole Moiety, A Protective Synthon for Indirect Radioiodination).

Mr. Cahn uses a multidisciplinary approach to matters by appearing before a variety of courts and agencies to obtain, enforce, and defend against asserted intellectual property rights.  He has extensive patent prosecution experience and is the attorney of record for hundreds of Federal trademark registrations. He has successfully represented clients in an array of Federal court litigations in a variety of patent, trademark, copyright and trade secret matters.  Mr. Cahn has also represented and advised clients in agency matters pending before the USPTO, the Trademark Trial and Appeal Board, U.S. Customs Service, and the Consumer Product and Safety Commission. The depth and diversity of his experience in the field of intellectual property allows him to effectively counsel clients in intellectual property acquisition, management, protection and enforcement.

E-mail: frederick.samuels@cahnsamuels.com

 

Admissions

  • Registered to practice before the US Patent & Trademark Office
  • U.S. Court of Appeals for the Federal Circuit
  • U.S. Court of Appeals for the Fourth Circuit
  • U.S. District Court for the District of Maryland
  • U.S. District Court for the District of Columbia
  • Courts of the State of Maryland and District of Columbia

 

Education

  • J.D., George Washington University, 1990
  • B.S.E.E., University of Maryland, 1986

 

Frederick N. Samuels is a partner with the firm.  He earned his Bachelor's Degree from the University of Maryland in Electrical Engineering, and his Juris Doctor from George Washington University.

Mr. Samuels began his career as a Patent Examiner in the United States Patent and Trademark Office and has been in private practice since 1990.  Mr. Samuels has extensive experience in all aspects of intellectual property, including administrative proceedings, patent and trademark procurement, technology transfer and licensing.  Mr. Samuels has substantial litigation experience in intellectual property matters both at the trial and appellate level.   Mr. Samuels focuses his broad experience to provide clients with strategic, business-orientated counseling in the acquisition, management and exploitation of their intellectual property.  In this regard, he has devised and implemented intellectual property business strategies for clients of all sizes and at all stages of development.

Mr. Samuels has a wealth of experience regarding government software rights, technical data rights and ownership issues arising out of the Bayh-Dole Act.  Over the years he has made a variety of presentations relating to intellectual property at client sites and at GIPLA meetings.  He also has participated in panel discussions hosted by Volunteer Lawyers for the Arts.

Mr. Samuels has prosecuted numerous patents in a vast array of technologies and has successfully handled patent appeals to the USPTO Board of Patent Appeals and Interferences (now Patent Trial and Appeal Board).  Exemplary technologies include electrical/computer hardware and software technologies, diagnostic devices, optomological devices, pet care products, e-commerce, and telemedicine.  Mr. Samuels also regularly prosecutes trademarks and copyrights for his clients both domestic and foreign.  In addition to ex parte matters before the USPTO, Mr. Samuels handles trademark opposition and cancellation proceedings for his clients.

 

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E-mail: george.metzenthin@cahnsamuels.com

 

Admissions

  • Registered to practice before the US Patent & Trademark Office
  • U.S. District Court for the District of Columbia
  • Supreme Court of Ohio
  • Supreme Court of Florida

 

Education

  • J.D., Case Western Reserve University, 1995
  • B.S.E.E., cum laude, Case Western Reserve University, 1992

 

George A. Metzenthin has been practicing intellectual property law since 1996. He is a partner with the firm. Mr. Metzenthin works closely with his clients to help them identify their intellectual property and develop strategies to build and utilize their technology. Mr. Metzenthin provides clients with invalidity and non-infringement opinions as the need arises and is appropriate for the client goals and considerations.

 

Prior to joining Cahn & Samuels, LLP, Mr. Metzenthin worked in private practice in the areas of civil litigation and intellectual property.  Mr. Metzenthin's practice encompasses all phases of intellectual property law including patent, trademark, copyright, and trade secret. He specializes in patent prosecution and licensing, with a particular emphasis in computer software, hardware, business methods and medical devices. Mr. Metzenthin regularly counsels clients regarding the global protection of their intellectual property and his familiarity with a wide variety of scientific and engineering disciplines enables him to understand, prepare and prosecute applications for his clients' innovations. Mr. Metzenthin has experience in all facets of patent prosecution before the USPTO including examination, appeal, ex parte reexamination, and interference proceedings.  Mr. Metzenthin handles inventions in a variety of technologies including software, medical devices, and electrical/mechanical devices.  He also has counseled clients on the use of design patent protection to further their goals.  His patent prosecution knowledge includes preparation of ex parte reexamination requests and defending patents being reexamined.  Based on this experience, he served as an expert witness regarding reexamination in Bortex Industry Co. Ltd. v. Fiber Optic Designs, Inc. (E.D. Pa. No. 2:12-cv-04228)(included a patent infringement claim).  Early in his practice, he participated in interferences including strategy leading into the interference and the conduct of it.

 

Mr. Metzenthin has counseled numerous clients regarding the use of trademarks and copyrights to further their goals and protect their developed intellectual property.  He has filed numerous trademark and copyright applications leading to issued registrations.  He has counseled clients regarding the use of designs for trademarks and trade dress.

 

Mr. Metzenthin has over 15 years experiencing assisting U.S. Army medical laboratories product the fruits of their research through strategies that meet the concerns and goals for the resulting intellectual property. He has made a variety of presentations regarding these topics and the internal procedures of USAMRMC to military and civilian personnel at medical centers and military laboratories.  In conjunction with the presentations on behalf of USAMRMC, he has assisted researchers and other personnel in identifying their inventions and prepared invention disclosures for those inventors. At times, he has the opportunity to provide counsel on the intellectual property rights of government contractors working individually or in conjunction with government employees. Mr. Metzenthin has developed knowledge about government software rights, technical data rights and Bayh-Dole Act obligations for contractors under funding agreements including contracts, grants, and CRADAs. Recently he finished a due diligence investigation encompassing all facets of intellectual property, technical data rights, and Government patent rights.

 

Mr. Metzenthin graduated cum laude from Case Western Reserve University with a Bachelor of Science in Electrical Engineering and Applied Physics with a minor in Economics.  While an undergraduate, he was admitted to Tau Beta Pi.  Mr. Metzenthin continued his educational endeavors by also attending law school at Case Western Reserve University.

 

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E-mail: warren.zitlau@cahnsamuels.com

 

Admissions

  • Registered to practice before the U.S. Patent & Trademark Office
  • Supreme Court of Pennsylvania
  • New York Court of Appeals
  • District of Columbia Court of Appeals
  • Virginia Supreme Court

 

Education

  • J.D., cum laude, Boston University School of Law, 1993
  • B.S., Ch.E., University of  Delaware, 1990

 

Warren A. Zitlau has been practicing in the field of intellectual property since 1995.  Mr. Zitlau specializes in patent and trademark prosecution, with an emphasis in chemical and mechanical disciplines, including coatings, fuel cells, oil and gas technology, pigments, food technology, industrial gases, medical adhesives, batteries, and medical and dental devices.  Mr. Zitlau also provides clients with invalidity and non-infringement opinions.

Prior to joining Cahn & Samuels, LLP in 2006, Mr. Zitlau worked in private practice at several boutique intellectual property firms in the areas of patent and trademark prosecution.

Mr. Zitlau is a member of the Pennsylvania, New York, and District of Columbia bars (1994), the Virginia bar (1996), and is admitted to practice before the United States District Court for the Eastern District of Virginia.

Mr. Zitlau is a member of the American Intellectual Property Law Association (AIPLA), the Intellectual Property Owners Association (IPO), the International Trademark Association (INTA), and the German Association for the Protection of Intellectual Property (GRUR).

Mr. Zitlau received a Juris Doctor cum laude from Boston University School of Law in 1993 and a Bachelor of Chemical Engineering from the University of Delaware in 1990, where he was admitted to Tau Beta Pi.

 

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E-mail:  jonathan.parthum@cahnsamuels.com

 

Admissions

• Massachusetts

• Virginia

 

Education

• Suffolk University Law School (J.D.) – 2009 — Concentration in Patent Law

• University of Massachusetts at Amherst (B.S.) - 2003 — Computer Engineering & Computer Science

 

Jonathan (Jon) W. Parthum began practicing in the field of intellectual property in 2009 and has extensive experience in a wide variety of technology areas ranging from mechanical devices to software applications. Mr. Parthum provides counseling on matters such as the patentability of new inventions and drafts patent applications to protect his clients' key innovations.  Having prosecuted over 1000 patent applications along with hundreds of personal Examiner interviews, Mr. Parthum excels at procuring patents for his clients.  In addition, he has experience in the appeals process, such as drafting appeal documents and conducting oral hearings at the United States Patent and Trademark Office (USPTO).  Mr. Parthum also helps clients by providing counseling on a wide range of topics such as patentability, invalidity, non-infringement and freedom to operate opinions.

Prior to joining the firm, Mr. Parthum worked in private practice in the area of intellectual property and worked in industry for a number of years as a computer engineer.

Mr. Parthum is a member of the American Bar Association and the American Intellectual Property Law Association (AIPLA).

 

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E-mail: caroline.mrohs@cahnsamuels.com

 

Admissions

  • Courts of the State of Maryland

 

Education

  • J.D., Catholic University of America Columbus School of Law, 2017
  • B.S., University of Maryland

 

Caroline Mrohs is a law clerk with the firm.  She is admitted to practice in the State of Maryland.  She graduated from the University of Maryland, College Park with a Bachelor of Science in Food Science and a Bachelor of Arts in Spanish. She graduated from the Catholic University of America Columbus School of Law in 2017 and was the Editor in Chief of the Catholic University Journal of Law and Technology. Her comment, discussing the need to include social media presence as an additional factor for courts to consider when determining the strength of a trademark, was published in the Journal in Fall 2016. She graduated with a Certificate from the Law and Technology Institute, which she received for taking several classes focused on specific areas of intellectual property law.

Ms. Mrohs has worked at Cahn & Samuels throughout law school since May 2015, and started working full-time in the fall of 2017. At Cahn & Samuels, she has gained experience and knowledge in the field of intellectual property by drafting opinions and responses to Office Actions, conducting legal research regarding issues in trademark, patent, and antitrust law, and assisting in litigation preparation relating to trademark infringement.

 

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Cahn & Samuels, LLP
1100 17th Street, NW | Suite 401 | Washington, DC 20036
Tel 202 331 8777 | Fax 202 331 3838 | E-mail us

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