Company lists · Data refreshed September 2026

Top 25 Patent law firms based in Canada

Name: Patent law firms based in Canada
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 124 companies tracked

RevenueBase identified 124 patent law firms headquartered in Canada as of September 2026 and tracks 1,644 professional contacts across them, including 865 with verified work emails and 119 with mobile numbers. Toronto is the largest hub.

This list covers patent law firms headquartered in Canada, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, how directly it supports the match, and when it was last checked. Data refreshed September 5, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review

124Companies

1,644Contacts tracked

865Verified emails

119Mobile numbers

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The 25 largest patent law firms based in Canada

Ranked by team size

Top 25 of 124 patent law firms based in Canada, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names patent law firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	Smart & BiggarPartial evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	501-1,000	521
	“Smart & Biggar is a Canadian intellectual property law firm.” Source: company website · checked Sep 5, 2026
2	ROBICIndirect evidence	Montréal, QC, CanadaHQ checked Sep 5, 2026	201-500	191
	“Plus de 130 ans d'excellence ROBIC est un cabinet multidisciplinaire de renommée internationale regroupant des professionnels aux compétences variées incluant des avocats, des…” Source: company website · checked Sep 5, 2026
3	MBM Intellectual Property LAW LLPPartial evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	51-200	131
	“MBM Intellectual Property Law is a dynamic and progressive law firm that practices exclusively in the area of intellectual property (IP) with offices throughout Canada.” Source: company website · checked Sep 5, 2026
4	Oyen Wiggs Green & Mutala LLPPartial evidence	Vancouver, BC, CanadaHQ checked Sep 5, 2026	11-50	50
	“Established in 1977, Oyen Wiggs is a Vancouver-based independent intellectual property boutique law firm.” Source: company website · checked Sep 5, 2026
5	PCK Intellectual PropertyPartial evidence	Toronto, ON, CanadaHQ checked Sep 5, 2026	11-50	46
	“PCK supports a broad range of intellectual property and commercial services around IP Identification, Procurement, Patent Drafting and Prosecution, Trademark Filing and…” Source: company website · checked Sep 5, 2026
6	Deeth Williams Wall LLPPartial evidence	Toronto, ON, CanadaHQ checked Sep 5, 2026	11-50	33
	“Deeth Williams Wall LLP is an entrepreneurial boutique law firm with locally and internationally recognized lawyers that cover all aspects of IP prosecution, commercialization and…” Source: company website · checked Sep 5, 2026
7	Riches, Mckenzie & Herbert LLPPartial evidence	Toronto, ON, CanadaHQ checked Sep 5, 2026	11-50	27
	“Founded in 1887 and headquartered in Toronto, Canada, the boutique law firm of Riches, McKenzie & Herbert LLP is one of Canada’s oldest firms, practising solely in the field of…” Source: company website · checked Sep 5, 2026
8	Dipchand LLPPartial evidence	Toronto, ON, CanadaHQ checked Sep 5, 2026	11-50	26
	“Dipchand LLP is a law firm of dedicated, passionate lawyers with exceptional business insight focused on intellectual property, corporate/commercial and franchise law, as well as…” Source: company website · checked Sep 5, 2026
9	Aird McburneyIndirect evidence	Toronto, ON, CanadaHQ checked Sep 5, 2026	11-50	21
	“As trusted practitioners in intellectual property (IP), the IP Group of Aird & Berlis LLP delivers practical, forward-looking strategies and IP protection that align with our…” Source: company website · checked Sep 5, 2026
10	Brion Raffoul LLPIndirect evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	11-50	17
	“BRION RAFFOUL LLP is a premier Canadian IP boutique firm.” Source: company website · checked Sep 5, 2026
11	Goudreau Gage Dubuc Maintenant NOW Lavery AvocatsIndirect evidence	Montréal, QC, CanadaHQ checked Sep 5, 2026	201-500	17
	“A Home For Your Ideas ® Goudreau Gage Dubuc (GGD) is one of Canada's most reputable intellectual property firms.” Source: company website · checked Sep 5, 2026
12	Cpst Intellectual PropertyIndirect evidence	Toronto, ON, CanadaHQ checked Sep 5, 2026	11-50	16
	“With almost 100 years of combined experience among its founders, CPST focuses on providing the highest standard of client service and advice, always informed by the business…” Source: company website · checked Sep 5, 2026
13	Kirby Eades Gale BakerIndirect evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	11-50	14
	“Founded in 1959 by Peter Kirby our firm is home to a team of highly qualified professionals who focus entirely upon intellectual property.” Source: company website · checked Sep 5, 2026
14	Aventum IP LAW LLPPartial evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	11-50	14
	“Aventum IP Law LLP (formerly Shapiro Cohen LLP) is an intellectual property firm located in the high-tech hub of Ottawa, Ontario.” Source: company website · checked Sep 5, 2026
15	PNK Piasetzki Nenniger Kvas LLPPartial evidence	Toronto, ON, CanadaHQ checked Sep 5, 2026	11-50	13
	“PNK Law LLP has been practicing exclusively in the area of intellectual property law for 30 years.” Source: company website · checked Sep 5, 2026
16	Heer LAWIndirect evidence	Toronto, ON, CanadaHQ checked Sep 5, 2026	11-50	13
	“We help businesses reach their full potential through effective acquisition, management, use and enforcement of intellectual property rights.” Source: company website · checked Sep 5, 2026
17	Nexus LAW Group LLPPartial evidence	Vancouver, BC, CanadaHQ checked Sep 5, 2026	11-50	13
	“Nexus Law Group LLP is an intellectual property law firm located in Vancouver and Victoria, Canada.” Source: company website · checked Sep 5, 2026
18	Brunet & COIndirect evidence	London, ON, CanadaHQ checked Sep 5, 2026	1-10	11
	“Brunet & Co.(aka BrunetCo) is a Canadian intellectual property firm serving both foreign and Canadian domestic markets.” Source: company website · checked Sep 5, 2026
19	Belmore Neidrauer LLPIndirect evidence	Toronto, ON, CanadaHQ checked Sep 5, 2026	11-50	10
	“Belmore Neidrauer excels in IP litigation.” Source: company website · checked Sep 5, 2026
20	Oziel LAWPartial evidence	Toronto, ON, CanadaHQ checked Sep 5, 2026	11-50	10
	“Oziel Law is an entrepreneurial law firm which provides corporate and business law, computer and technology law, intellectual property (IP) law and contract drafting legal…” Source: company website · checked Sep 5, 2026
21	Aitken Klee LLPIndirect evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	11-50	10
	“Aitken Klee specializes in complex intellectual property litigation.” Source: company website · checked Sep 5, 2026
22	Anglehart ET ALIndirect evidence	Montreal, QC, CanadaHQ checked Sep 5, 2026	1-10	10
	Source: company website · checked Sep 5, 2026
23	Ollip P.CIndirect evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	1-10	10
	“Protecting IP Assets in Canada & Around the World If you are a brand or technology owner, you don’t have to be told about the value of protecting and enforcing your assets.” Source: company website · checked Sep 5, 2026
24	Rowand LLPIndirect evidence	Toronto, ON, CanadaHQ checked Sep 5, 2026	11-50	9
	“Rowand LLP was established to provide practical and valuable intellectual property services for entrepreneurs and established companies working at the leading edge of technology.” Source: company website · checked Sep 5, 2026
25	Sprigings Intellectual Property LAWPartial evidence	Toronto, ON, CanadaHQ checked Sep 5, 2026	11-50	8
	“Sprigings focuses on patent and trademark litigation, with an emphasis on pharmaceuticals and trademark prosecution.” Source: company website · checked Sep 5, 2026

Showing 25 of 124 patent law firms based in Canada

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Patent law firms based in Canada at a glance

As of Sep 5, 2026

1-10Median size (employees)

TorontoLargest hub · 42 HQs

119Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

Verified emails by last verification

0–30

811

31–60

61–90

90–180

180+

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among patent law firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Canada whose own description of what they do matches “patent law firms”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among patent law firms, and records with no verified work email. Companies headquartered outside Canada are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and an evidence rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 865 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 5, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Patent law firms by metro

Patent law firms in Toronto42

Frequently asked

How many patent law firms are there based in Canada?

RevenueBase identified 124 patent law firms headquartered in Canada as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Smart & Biggar, headquartered in Ottawa, tops this list with the largest team on record.

Which city has the most patent law firms?

Toronto leads with 42 headquartered companies, followed by Ottawa (18) and Montreal (15).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 865 verified decision-maker contacts tracked across these 124 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 5, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.