Registered patent attorney
John A CastellanoIII
Firm
Harness, Dickey & Pierce, P.L.C.
Address
11730 Plaza America Drive, Suite 600
Reston, VA, 20190
US
Phone
Registered as
Registered patent attorney
Other attorneys at Harness, Dickey & Pierce, P.L.C.
- Damian M AquinoUSPTO Reg. 54964 · Troy, MI
- Michael P BrennanUSPTO Reg. 30612 · Troy, MI
- Christopher M BrockUSPTO Reg. 27313 · Troy, MI
- Christopher M CaubleUSPTO Reg. 61040 · Frisco, TX
- Alex C ChangUSPTO Reg. 52716 · Reston, VA
- Jeffrey J ChappUSPTO Reg. 50579 · Troy, MI
- William J CoughlinUSPTO Reg. 29143 · Troy, MI
- Robert L CoxUSPTO Reg. 49035 · Troy, MI
Other patent attorneys in Reston, Virginia
- Mary E. AdamsMatney Legal Group PLLC
- Pouyan AhmadiUSPTO Reg. 82897
- Byeong C AhnKed & Associates, LLP
- Ralph P AlbrechtReston Law Group, LLP
- Brian C AltmillerPosz Law Group, PLC
- Scott B. AmankwatiaThe Marbury Law Group PLLC
- John H AmbroseHarness Dickey & Pierce, P.L.C.
- Amy Kuo AmesVERISIGN, INC.
Frequently asked
Frequently asked about John A Castellano
Is John A Castellano a registered patent attorney?
Yes. John A Castellano is a registered patent attorney with the United States Patent and Trademark Office (USPTO Registration Number 35094). Registration is verified against the USPTO Office of Enrollment and Discipline roster.
Where is John A Castellano located?
John A Castellano's office is in Reston, Virginia (20190). Affiliated with Harness, Dickey & Pierce, P.L.C..
What firm does John A Castellano work at?
John A Castellano is listed as affiliated with Harness, Dickey & Pierce, P.L.C. on the USPTO Office of Enrollment and Discipline practitioner roster.
How do I contact John A Castellano?
John A Castellano's office phone (per the USPTO public roster) is 703-668-8029. 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.