Registered patent agent
Derek W Barnett
Firm
Marshall, Gerstein & Borun LLP
Address
233 S Wacker Dr
6300 Willis Tower
Chicago, IL, 60606
US
Phone
Registered as
Registered patent agent
Other attorneys at Marshall, Gerstein & Borun LLP
- Michael J AllikianUSPTO Reg. 63549 · Chicago, IL
- Matthew N AllisonUSPTO Reg. 68746 · Chicago, IL
- Michael R. AndersonUSPTO Reg. 74659 · Chicago, IL
- Richard H AndersonUSPTO Reg. 26526 · Chicago, IL
- Andrew W BatemanUSPTO Reg. 64050 · Omaha, NE
- Jeanne M BrashearUSPTO Reg. 56301 · Chicago, IL
- Eric M. BruscaUSPTO Reg. 52664 · Chicago, IL
- Matthew R. CareyUSPTO Reg. 61082 · Chicago, IL
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 Derek W Barnett
Is Derek W Barnett a registered patent attorney?
Derek W Barnett is a registered patent agent (USPTO Registration Number 64635). Patent agents can prepare and file patent applications but cannot give legal advice on infringement; for legal counsel, look for an attorney.
Where is Derek W Barnett located?
Derek W Barnett's office is in Chicago, Illinois (60606). Affiliated with Marshall, Gerstein & Borun LLP.
What firm does Derek W Barnett work at?
Derek W Barnett is listed as affiliated with Marshall, Gerstein & Borun LLP on the USPTO Office of Enrollment and Discipline practitioner roster.
How do I contact Derek W Barnett?
Derek W Barnett's office phone (per the USPTO public roster) is 312-474-6300. 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.