Registered patent attorney
Brendan D. O'Callaghan
Firm
Baker & McKenzie LLP
Address
815 Connecticut Avenue NW
Washington, DC, 20006
US
Phone
Registered as
Registered patent attorney
Other attorneys at Baker & McKenzie LLP
- Darrian L CampbellUSPTO Reg. 70769 · Dallas, TX
- Robert Edward DuffyUSPTO Reg. 68426 · Washington, DC
- Anthony V FlintUSPTO Reg. 55186 · New York, NY
- Myall S HawkinsUSPTO Reg. 50231 · Houston, TX
- Hayden J. MattickUSPTO Reg. 83901 · Dallas, TX
- Monika PatelUSPTO Reg. 83231 · Dallas, TX
- Carlos R. Perez ToroUSPTO Reg. 69978 · Washington, DC
- Derek A. RheaUSPTO Reg. 83068 · Dallas, TX
Other patent attorneys in Washington, District of Columbia
- Alisa S AbbottBanner Witcoff
- Ahmed Abdel-RahmanPillsbury Winthrop Shaw Pittman LLP
- Margaret A AbernathyBaker & Hostetler LLP
- Michael T. AbramsonJordan IP Law
- Khadija Abdulkadir AbuHoward University School of Law
- Deepa AcharyaQuinn Emanuel UrQuhart & Sullivan LLP
- Canek AcostaMayer Brown LLP
- Stephanie N. AdamakosPaul Hastings LLP
Frequently asked
Frequently asked about Brendan D. O'Callaghan
Is Brendan D. O'Callaghan a registered patent attorney?
Yes. Brendan D. O'Callaghan is a registered patent attorney with the United States Patent and Trademark Office (USPTO Registration Number 80105). Registration is verified against the USPTO Office of Enrollment and Discipline roster.
Where is Brendan D. O'Callaghan located?
Brendan D. O'Callaghan's office is in Washington, District of Columbia (20006). Affiliated with Baker & McKenzie LLP.
What firm does Brendan D. O'Callaghan work at?
Brendan D. O'Callaghan is listed as affiliated with Baker & McKenzie LLP on the USPTO Office of Enrollment and Discipline practitioner roster.
How do I contact Brendan D. O'Callaghan?
Brendan D. O'Callaghan's office phone (per the USPTO public roster) is 703-424-1652. 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.