Charles O. Busch
Patent agent, USPTO registration number 84443, status Active.
- Firm
- McDonnell Boehnen Hulbert & Berghoff LLP
- Location
- Chicago, IL
- On the USPTO roster since
- April 2026
Charles O. Busch is a USPTO-registered patent agent (registration number 84443) at McDonnell Boehnen Hulbert & Berghoff LLP, in Chicago, IL. The registration is active on the current USPTO roster, and Charles O. Busch has been listed on the roster since April 2026.
McDonnell Boehnen Hulbert & Berghoff LLP is listed with one registered practitioner on the current roster.
Chicago, IL has 1,896 registered patent practitioners in all: 1,537 patent attorneys and 303 patent agents.
Other registered practitioners in Chicago, IL
- Karl R. Fink — Patent attorney, Reg. No. 34161, Fitch, Even,Tabin, Flannery, LLP
- Herbert H. Finn — Patent attorney, Reg. No. 38139, Greenberg Traurig, LLP
- Anika E. Fischer — Patent agent, Reg. No. 84665, Chicago-Kent College of Law
- Ryan J. Fischer — Patent agent, Reg. No. 55180
- Julie A. Fischer — Patent agent, Reg. No. 81577
- Jennifer L. Fitzgerald — Patent attorney, Reg. No. 39976, Freeborn & Peters LLP
- Ryan T. Fitzgerald — Patent attorney, Reg. No. 79303, Crowell & Moring
- Katherine J. Fitzpatrick — Patent attorney, Reg. No. 61596, WM. Wrigley Jr. Company
All patent attorneys and agents in Chicago, IL
Patent firms in Illinois · Practitioners by state
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