Registered patent agent
Haiyin Chang
Firm
Children's National Hospital
Address
ATTN: Haiyin Chang, 111 Michigan Avenue, NW,
M7779 - Sheikh Zayed Institute
Washington, DC, 20010
US
Phone
Registered as
Registered patent agent
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Frequently asked
Frequently asked about Haiyin Chang
Is Haiyin Chang a registered patent attorney?
Haiyin Chang is a registered patent agent (USPTO Registration Number 73241). Patent agents can prepare and file patent applications but cannot give legal advice on infringement; for legal counsel, look for an attorney.
Where is Haiyin Chang located?
Haiyin Chang's office is in Washington, District of Columbia (20010). Affiliated with Children's National Hospital.
What firm does Haiyin Chang work at?
Haiyin Chang is listed as affiliated with Children's National Hospital on the USPTO Office of Enrollment and Discipline practitioner roster.
How do I contact Haiyin Chang?
Haiyin Chang's office phone (per the USPTO public roster) is 202-476-6854. 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.