`
`BEFORE THE PATENT TRIAL AND APPEAL BOARD
`
`IBG LLC; INTERACTIVE BROKERS LLC; TRADESTATION GROUP, INC.;
`TRADESTATION SECURITIES, lNC.; TRADESTATION TECHNOLOGIES,
`INC.; IBFX, INC.; CQG, INC.; and CQGT, LLC
`Petitioners
`
`V.
`
`TRADING TECHNOLOGIES INTERNATIONAL, INC.
`Patent Owner
`
`Patent No. 7,533,056
`
`IBFX, INC.
`POWER OF ATTORNEY PURSUANT TO 37 C.F.R. §42.10(b)
`
`Mail Stop “PA TENT BOARD”
`Patent Trial and Appeal Board
`U.S. Patent and Trademark Office
`
`P.O. Box 1450
`
`Alexandria, VA 22313-1450
`
`
`
`Pursuant to 37 C.F.R. § 42.10(b), Petitioner IBFX, lnc., having a principal
`
`place of business at 3165 E. Millrock Drive, Suite 200 Salt Lake City, UT 84121,
`
`hereby appoints the practitioners of Customer No. 2611 1 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. No. 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
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`202.371.2600 (reception)
`
`202.371.2540 (facsimile)
`
`rsokohl-PTAB@skgf.com
`
`lgordon—PTAB @skgf.co1n
`
`jstrang—PTAB@skgf.corn
`
`FOR:
`
`IBFX Inc.
`
`
`
`
`
`SIGNATURE: