John T. Callahan

Patent attorney, USPTO registration number 32607, status Active.

Firm

Sughrue Mion, PLLC

Location

Washington, DC

On the USPTO roster since

before May 2006

John T. Callahan is a USPTO-registered patent attorney (registration number 32607) at Sughrue Mion, PLLC, in Washington, DC. The registration is active on the current USPTO roster, and John T. Callahan has been listed on the roster since before May 2006.

Sughrue Mion, PLLC has 76 registered patent practitioners on the roster (55 patent attorneys and 19 patent agents), so John T. Callahan works alongside 75 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

• Salvatore J. Arrigo — Patent attorney, Reg. No. 46063, Arrigo, Lee, Guttman & Mouta-Bellum LLP
• Veronica S. Ascarrunz — Patent attorney, Reg. No. 52571, Sheppard
• Anthony Achiri Asongwed — Patent agent, Reg. No. 48081, Federal Communications Commission
• Rida Atif — Patent agent, Reg. No. 79976, Wilson Sonsini Goodrich & Rosati
• Robert A. Auchter — Patent attorney, Reg. No. 38069, Auchter PLLC
• Derek A. Auito — Patent attorney, Reg. No. 52576, Dentons US LLP
• Christian Austin-Hollands — Patent attorney, Reg. No. 46527, Christian Austin-Hollands Esq.
• Brian William Avery — Patent attorney, Reg. No. 60356, Jefferson IP

All patent attorneys and agents in Washington, DC

Patent firms in District of Columbia · Practitioners by state

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