`
`BEFORE THE PATENT TRIAL AND APPEAL BOARD
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`IBG LLC; INTERACTIVE BROKERS LLC; TRADESTATION GROUP, INC.;
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`TRADESTATION SECURITIES, INC.; TRADESTATION TECHNOLOGIES,
`INC.; IBFX, INC.; CQG, INC.; and CQGT, LLC
`Petitioners
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`V.
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`TRADING TECHNOLOGIES INTERNATIONAL, INC.
`Patent Owner
`
`Patent NO. 7,533,056
`
`TRADESTATION GROUP, INC.’S
`POWER OF ATTORNEY PURSUANT TO 37 C.F.R. §42.10(b)
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`Mail Stop “PA TENT BOARD”
`Patent Trial and Appeal Board
`U.S. Patent and Trademark Office
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`P.O. Box 1450
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`Alexandria, VA 223 13-1450
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`
`
`U.S. Patent No. 7,533,056
`
`Pursuant
`
`to 37 C.F.R.
`
`§ 42.10(b), TradeStation Group,
`
`Inc., having a
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`principal place of business at 8050 SW 10th Street, Suite 2000, Plantation, FL
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`33324, hereby appoints the practitioners of Customer No. 26111 as its attorneys to
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`transact all business in the United States Patent & Trademark Office associated
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`with the covered business method review of U.S. Patent No. 7,533,056. These
`
`attorneys include at least:
`
`Robert E. Sokohl (Reg. No. 36,013)
`Lead Counsel:
`Back—up Counsel: Lori A. Gordon (Reg. No. 50,633)
`Jonathan M. Strang (Reg. No. 61,724)
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`ph: 202.772.8677
`ph: 202.772.8862
`ph: 202.772.8893
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`Address:
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`STERNE, KESSLER, GOLDSTEIN & Fox P.L.L.C.
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`1100 New York Avenue, NW
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`Washington, DC 20005
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`202.3 71.2600 (reception)
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`202.371.2540 (facsimile)
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`rsokohl-PTAB@skgf.com
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`lgordon-PTAB@skgf.com
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`jstrang—PTAB@skgf.com
`
`FOR:
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`TradeStation Group, Inc.