Philip J. Crihfield

Patent attorney, USPTO registration number 25621, status Active.

Firm

Sidley Austin Brown and Wood

Location

Chicago, IL

On the USPTO roster since

before May 2006

Philip J. Crihfield is a USPTO-registered patent attorney (registration number 25621) at Sidley Austin Brown and Wood, in Chicago, IL. The registration is active on the current USPTO roster, and Philip J. Crihfield has been listed on the roster since before May 2006.

Sidley Austin Brown and Wood has 4 registered patent practitioners on the roster (4 patent attorneys), so Philip J. Crihfield works alongside 3 other registered practitioners there.

Chicago, IL has 1,896 registered patent practitioners in all: 1,537 patent attorneys and 303 patent agents.

Other registered practitioners in Chicago, IL

• Aaron A. Barlow — Patent attorney, Reg. No. 34119, Jenner & Block ,LLP
• Carol Lynn Barnes — Patent attorney, Reg. No. 48646, Carol Lynn Barnes, Attorney at Law
• Sean Joseph Barnes — Limited recognition, Reg. No. 902817, DePaul University College of Law
• Dunstan H. Barnes — Patent attorney, Reg. No. 78560, McAndrews Held & Malloy LTD
• Derek W. Barnett — Patent agent, Reg. No. 64635, Marshall ,Gerstein & Borun LLP
• Michael E. Barrett — Patent attorney, Reg. No. 74508, CNA Global Specialty Lines
• Robert M. Barrett — Patent agent, Reg. No. 30142, K&L Gates LLP
• Timothy J. Barron — Patent attorney, Reg. No. 39599, Jenner & Block ,LLP

All patent attorneys and agents in Chicago, IL

Patent firms in Illinois · Practitioners by state

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