Registered patent attorney
David B. Fischer
Firm
Keller and Heckman, LLP.
Address
1001 G Street NW
Washington, DC, 20001
US
Phone
Registered as
Registered patent attorney
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Frequently asked
Frequently asked about David B. Fischer
Is David B. Fischer a registered patent attorney?
Yes. David B. Fischer is a registered patent attorney with the United States Patent and Trademark Office (USPTO Registration Number 61134). Registration is verified against the USPTO Office of Enrollment and Discipline roster.
Where is David B. Fischer located?
David B. Fischer's office is in Washington, District of Columbia (20001). Affiliated with Keller and Heckman, LLP..
What firm does David B. Fischer work at?
David B. Fischer is listed as affiliated with Keller and Heckman, LLP. on the USPTO Office of Enrollment and Discipline practitioner roster.
How do I contact David B. Fischer?
David B. Fischer's office phone (per the USPTO public roster) is 202-360-9991. 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.