Charles L Riddle

Trademark attorney of record on 808 registered marks in USPTO records.

808registrations of record

11list appearances

#1best rank achieved

30states represented

Recognition

Top Trademark Attorney #6 — Pennsylvania	All years · 508 registrations
Top Trademark Attorney #2 — Pennsylvania	2026 · 63 registrations
Top Trademark Attorney #3 — Pennsylvania	2025 · 47 registrations
Top Trademark Attorney #9 — Maryland	2025 · 18 registrations
Top Trademark Attorney #2 — Pennsylvania	2024 · 61 registrations
Top Trademark Attorney #1 — Pennsylvania	2023 · 41 registrations
Top Trademark Attorney #1 — Pennsylvania	2022 · 50 registrations
Top Trademark Attorney #1 — Pennsylvania	2021 · 50 registrations
Top Trademark Attorney #2 — Pennsylvania	2020 · 40 registrations
Top Trademark Attorney #3 — Pennsylvania	2019 · 34 registrations
Top Trademark Attorney #4 — Pennsylvania	2016 · 28 registrations

Registrations by year

2026	96
2025	81
2024	98
2023	79
2022	88
2021	85
2020	54
2019	42
2018	27
2017	24
2016	32
2015	19
2014	29
2013	8
2012	9
2011	2
2010	4
2009	10
2008	5
2007	2

Where their clients are incorporated

Pennsylvania	508 registrations
Delaware	79 registrations
Maryland	61 registrations
New Jersey	58 registrations
New York	15 registrations
Florida	13 registrations
California	12 registrations
Texas	7 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