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Stefanie Di Giandomenico

IP Lawyer


Stefanie is an associate intellectual property lawyer at Heer Law. Her interest in intellectual property, and patent law in particular, evolved from her passion for scientific discovery and innovation. Stefanie completed both Bachelor and Master of Science degrees prior to attending law school, and has many years of practical scientific research experience. She understands the methods, language, challenges, concerns, and priorities of scientists and innovators, which allows her to better serve her clients.

Stefanie specializes in intellectual property litigation and dispute resolution involving patents, trademarks, and copyright. Stefanie enforces her clients' intellectual property rights and defends her clients against allegations of infringement. She leverages the problem solving and critical thinking skills she developed in the laboratory to help her clients achieve their goals inside and outside the courtroom.

IP Litigation

Stefanie has assisted many clients enforce their intellectual property rights and defend against allegations of infringement. She has represented plaintiffs and defendants in complex patent, copyright, and trademark disputes. Stefanie has worked on several trials and appeals, and has appeared before the Federal Court and the Ontario Small Claims Court.

Stefanie prepares opinions for intellectual property rights holders on whether competitors have infringed their rights. If the client's rights have been infringed, she can prepare cease and desist letters, negotiate licensing agreements, or start court proceedings to obtain compensation for past infringement and to prevent infringement in the future.

Stefanie also works with clients that have been alleged to infringe the intellectual property rights of others, by assessing the strength of the allegations, canvassing potential defences, and providing opinions on the validity of the rights asserted against them. She also responds to cease and desist letters, negotiates licences, and defends clients in court proceedings.

Stefanie also prepares freedom to practice or operate opinions for clients entering into new business ventures to ensure that their planned activities do not infringe the intellectual property rights of third parties.


Stefanie specializes in patent disputes in and out of court. She has assisted clients with patent infringement, impeachment, and damages actions and appeals.


Stefanie has assisted clients with copyright infringement actions. She also advises clients on copyright infringement notices forwarded by Internet Service Providers and on self-audit requests from the Business Software Alliance (BSA).


Stefanie acts for clients in trademark infringement, passing off, counterfeiting, and cybersquatting disputes.

Stefanie also works with clients before they apply for or begin to use a mark in Canada. She provides trademark searches and opinions on whether the proposed mark will likely be registrable and whether the mark can be used in association with particular goods and services without infringing a third party's trademark rights.

Past Legal Employment

Prior to joining Heer Law, Stefanie was an associate at an IP litigation firm in downtown Toronto (Belmore Neidrauer LLP), specializing in complex patent disputes. She also summered and articled in the IP department of an international Bay Street firm (Gowlings).

Legal Education

Stefanie graduated from the University of Toronto, Faculty of Law. She was an executive member of the school's Technology and IP Group, organizing various IP seminars and conferences. Stefanie also volunteered as an Associate Editor for the Journal of Law and Equality, a Faculty of Law Peer Mentor, and a caseworker with Downtown Legal Services.

Stefanie was called to the Bar of Ontario in 2015.

Pre-Law Education

Stefanie holds a Master of Science degree from the University of Toronto, Department of Medical Biophysics. She conducted cancer research at Princess Margaret Hospital as part of her graduate studies and wrote a thesis entitled "Characterizing the Mechanism of Cul7-Mediated Inhibition of Cell Death".

Stefanie also holds a Bachelor of Science degree with Honours in Biochemistry from York University, graduating First Class with Distinction. She was bestowed The Society of Chemical Industry Merit Award and various institutional and governmental scholarships throughout her undergraduate career.

Stefanie Di Giandomenico


Phone: 416-546-7303
Fax: 416-352-5709