Registered patent attorney
Dan Liu
Firm
Crowell & Morning LLP
Address
455 N. Cityfront Plaza Drive
NBC Tower - Suite 3600
Chicago, IL, 60611
US
Phone
Registered as
Registered patent attorney
Other attorneys at Crowell & Morning LLP
Other patent attorneys in Chicago, Illinois
- Lawrence H AaronsonMcDonnell Boehnen Hulbert & Berghoff LLP
- Dennis J AbdelnourHonigman LLP
- Holby Matthew AbernNeal, Gerber & Eisenberg LLP
- Cassandra L. AbernathyUSPTO Reg. 75330
- John AbramicSteptoe & Johnson LLP
- David Brian AbramowitzLocke Lord LLP
- Hugh A AbramsShook, Hardy & Bacon LLP
- Matthias AbrellMarshall Gerstein & Borun, LLP
Frequently asked
Frequently asked about Dan Liu
Is Dan Liu a registered patent attorney?
Yes. Dan Liu is a registered patent attorney with the United States Patent and Trademark Office (USPTO Registration Number 78847). Registration is verified against the USPTO Office of Enrollment and Discipline roster.
Where is Dan Liu located?
Dan Liu's office is in Chicago, Illinois (60611). Affiliated with Crowell & Morning LLP.
What firm does Dan Liu work at?
Dan Liu is listed as affiliated with Crowell & Morning LLP on the USPTO Office of Enrollment and Discipline practitioner roster.
How do I contact Dan Liu?
Dan Liu's office phone (per the USPTO public roster) is 312-840-3267. 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.