John L Ambrogi

Trademark attorney of record on 1,041 registered marks in USPTO records.

1,041registrations of record

15list appearances

#2best rank achieved

26states represented

Recognition

Top Trademark Attorney #5 — Illinois	All years · 641 registrations
Top Trademark Attorney #6 — Illinois	2026 · 28 registrations
Top Trademark Attorney #8 — Illinois	2025 · 32 registrations
Top Trademark Attorney #6 — Illinois	2023 · 33 registrations
Top Trademark Attorney #8 — Illinois	2022 · 30 registrations
Top Trademark Attorney #3 — Illinois	2019 · 46 registrations
Top Trademark Attorney #3 — Illinois	2018 · 41 registrations
Top Trademark Attorney #2 — Illinois	2017 · 35 registrations
Top Trademark Attorney #7 — Illinois	2016 · 28 registrations
Top Trademark Attorney #7 — Illinois	2015 · 30 registrations
Top Trademark Attorney #5 — Illinois	2014 · 35 registrations
Top Trademark Attorney #7 — Illinois	2013 · 36 registrations
Top Trademark Attorney #7 — Illinois	2012 · 30 registrations
Top Trademark Attorney #8 — Illinois	2007 · 24 registrations
Top Trademark Attorney #5 — Illinois	2004 · 19 registrations

Registrations by year

2026	50
2025	57
2024	52
2023	61
2022	49
2021	48
2020	51
2019	72
2018	62
2017	53
2016	44
2015	52
2014	42
2013	48
2012	37
2011	27
2010	22
2009	31
2008	29
2007	39

Where their clients are incorporated

Illinois	641 registrations
Delaware	122 registrations
Florida	17 registrations
New Jersey	16 registrations
Wyoming	15 registrations
Texas	12 registrations
New York	8 registrations
Virginia	8 registrations

Based on the owner address of record. Companies frequently incorporate in one state while operating in another, so this reflects client domicile rather than where the attorney practises.

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How this list is compiled

TrademarkToolbox Top Trademark Attorney lists are not a ranking of attorney quality. Rank is based solely on the number of trademark registrations that list the attorney as attorney of record, for applications tied to the jurisdictions listed above. It measures filing volume, nothing else.

Volume reflects firm size, practice model and client mix. A solo practitioner handling a small number of complex matters will rank below a high-volume filing practice, and that says nothing about the quality of either. These lists are not an endorsement, a recommendation, or a substitute for your own due diligence when choosing counsel.

Data comes from USPTO public records as indexed by TrademarkToolbox. Attorney names are matched conservatively: we do not merge similar names, so an attorney who appears in the record under more than one form may be undercounted. Counts include registered marks only, by registration year. Full methodology · Request a correction or removal