`
`BEFORE THE PATENT TRIAL AND APPEAL BOARD
`
`IBG LLC; INTERACTIVE BROKERS LLC; TRADESTATION GROUP, INC. ;
`TRADESTATION SECURITIES, INC.; TRADESTATION TECHNOLOGIES,
`INC.; IBFX, INC.; CQG, INC.; and CQGT, LLC
`Petitioners
`
`V.
`
`TRADING TECHNOLOGIES INTERNATIONAL, INC.
`Patent Owner
`
`Patent No. 7,533,056
`
`INTERACTIVE BROKERS LLC’S
`POWER OF ATTORNEY PURSUANT TO 37 C.F.R. §42§10(b)
`
`Mail Stop “PATENT BOARD”
`Patent Trial and Appeal Board
`U.S. Patent and Trademark Office
`
`P.O.B0x1450 .
`
`Alexandria, VA 22313-1450
`
`
`
`U.S. Patent No. 7,533,056
`
`Pursuant to 37 C.F.R. § 42.10(b), Petitioner Interactive Brokers LLC, having
`
`a principal place of business at One Pickwick Plaza, Greenwich, CT 06830, hereby
`
`appoints the practitioners of Customer No. 26111 as its attorneys to transact all
`
`business in the United States Patent & Trademark Office associated with the
`
`covered business method review of U.S. Patent No. 7,533,056. These attorneys
`
`include at least:
`
`Lead Counsel:
`
`Back-up Counsel:
`
`Robert E. Sokohl (Reg.NNo. 36,013)
`Lori A. Gordon (Reg. No. 50,633)
`Jonathan M. Strang (Reg. No. 61,724)
`
`ph: 202.772.8677
`ph: 202.772.8862
`ph: 202.772.8893
`
`Address:
`
`STERNE, KESSLER, GOLDSTEIN & Fox P.L.L.C.
`
`1100 New York Avenue, NW
`
`Washington, DC 20005
`202.371.2600 (reception)
`
`202.371.2540 (facsimile)
`
`rsokohl-PTAB@skgf.corn
`
`lgordon-PTAB @skgf.com
`
`jstrang—PTAB @skgf.com
`
`FOR:
`
`Interactive Brokers LLC
`
`SIGNATURE:
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