Registered patent attorney
Donald J O'Brien
Firm
Andrus IP Law
Don O'Brien
Address
790 N. Water St.
Suite 2200
Milwaukee, WI, 53202
US
Phone
Registered as
Registered patent attorney
Other patent attorneys in Milwaukee, Wisconsin
- Jeremy AdelsonHansen Reynolds LLC
- William W. AdolfsenAndrus Intellectual Property Law, LLP
- Masroor AhmadMichael Best & Friedrich
- Tara J AjlounyUSPTO Reg. 83877
- Scott D AndersonFoley & Lardner LLP
- Daniel J. ArkQuarles and Brady, LLP
- Brent Elliott AussprungMichael Best
- Christopher B AustinMichael Best & Friedrich, LLP
Frequently asked
Frequently asked about Donald J O'Brien
Is Donald J O'Brien a registered patent attorney?
Yes. Donald J O'Brien is a registered patent attorney with the United States Patent and Trademark Office (USPTO Registration Number 59016). Registration is verified against the USPTO Office of Enrollment and Discipline roster.
Where is Donald J O'Brien located?
Donald J O'Brien's office is in Milwaukee, Wisconsin (53202). Affiliated with Andrus IP Law.
What firm does Donald J O'Brien work at?
Donald J O'Brien is listed as affiliated with Andrus IP Law on the USPTO Office of Enrollment and Discipline practitioner roster.
How do I contact Donald J O'Brien?
Donald J O'Brien's office phone (per the USPTO public roster) is 414-271-7590. 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.