Registered patent attorney
John C Dorfman
Firm
Dann Dorfman Herrell and Skillman, P.C.
Address
1601 Market Street
Suite 2400
Philadelphia, PA, 19103-2307
US
Phone
Registered as
Registered patent attorney
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Frequently asked
Frequently asked about John C Dorfman
Is John C Dorfman a registered patent attorney?
Yes. John C Dorfman is a registered patent attorney with the United States Patent and Trademark Office (USPTO Registration Number 16703). Registration is verified against the USPTO Office of Enrollment and Discipline roster.
Where is John C Dorfman located?
John C Dorfman's office is in Philadelphia, Pennsylvania (19103-2307). Affiliated with Dann Dorfman Herrell and Skillman, P.C..
What firm does John C Dorfman work at?
John C Dorfman is listed as affiliated with Dann Dorfman Herrell and Skillman, P.C. on the USPTO Office of Enrollment and Discipline practitioner roster.
How do I contact John C Dorfman?
John C Dorfman's office phone (per the USPTO public roster) is 215-563-4100. Verify availability and intake details directly with the firm before sending privileged materials.
Should I prepare anything before contacting a patent attorney?
Yes — most patent attorneys quote based on a brief. Persoona's intellectual property module generates a prior-art analysis, defensibility scorecard, and a draft USPTO filing package so you arrive with a brief, not a blank slate. Free to run.
Profile sourced from the USPTO OEDCI Practitioner Roster. Persoona did not provide, edit, or curate this data — every field is pulled directly from the public roster.