James E. Hopenfeld

Patent attorney, USPTO registration number 47661, status Active.

Firm

Osha Liang LLP

Location

Washington, DC

On the USPTO roster since

before May 2006

James E. Hopenfeld is a USPTO-registered patent attorney (registration number 47661) at Osha Liang LLP, in Washington, DC. The registration is active on the current USPTO roster, and James E. Hopenfeld has been listed on the roster since before May 2006.

Osha Liang LLP has 5 registered patent practitioners on the roster (3 patent attorneys and 2 patent agents), so James E. Hopenfeld works alongside 4 other registered practitioners there.

Washington, DC has 2,644 registered patent practitioners in all: 1,995 patent attorneys and 568 patent agents.

Other registered practitioners in Washington, DC

• Rebekah L. Coover — Patent attorney, Reg. No. 68147
• Ruffin B. Cordell — Patent attorney, Reg. No. 33487, Fish & Richardson P.C. The McPherson Building
• Barbara M. Corkery — Patent attorney, Reg. No. 41019, Naval Sea Systems Command Office of General Counsel
• Thomas Anthony Corrado — Patent attorney, Reg. No. 42439, Arent Fox LLP
• Catherine C. Corser — Patent attorney, Reg. No. 78188, Finnegan Henderson Farabow Garrett & Dunner L.L.P
• Shruti Singh Costales — Patent attorney, Reg. No. 56333, Shruti Law PLLC
• Jeffrey L. Costellia — Patent attorney, Reg. No. 35483, Nixon Peabody LLP
• Ashlynn Brittney Cottoy — Limited recognition, Reg. No. 902861, Howard University School of Law

All patent attorneys and agents in Washington, DC

Patent firms in District of Columbia · Practitioners by state

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