`
`BEFORE THE PATENT TRIAL AND APPEAL BOARD
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`IBG LLC; INTERACTIVE BROKERS LLC; TRADESTATION GROUP, INC.;
`TRADESTATION SECURITIES, INC.;
`TRADESTATION TECHNOLOGIES, INC.; and IBFX, INC.
`Petitioners
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`V.
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`TRADING TECHNOLOGIES INTERNATIONAL, INC.
`Patent Owner
`
`Patent No. 7,676,411
`
`.
`IBG LLC’S
`_
`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»
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`
`
`U.S. Patent No. 7,676,411
`
`Pursuant to 37 C.F.R. § 42.10(b), Petitioner IBG LLC, having a principal
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`place of business at One Pickwick Plaza, Greenwich, CT 06830, hereby appoints
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`the practitioners of Customer No. 26111 as its attorneys to transact all business in
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`the United States Patent & Trademark Office associated with the covered business
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`method review of U.S. Patent No. 7,676,411. These attorneys include at least:
`
`Lead Counsel:
`
`Back—up Counsel:
`
`Robert E. Sokohl (Reg. No. 36,013)
`Lori A. Gordon (Reg. No. 50,633)
`Richard Bemben (Reg. No. 68,658)
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`ph: 202.772.8677
`ph: 202.772.8862
`ph: 202.772.8549
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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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`202.371.2600 (reception)
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`202.371.2540 (facsimile)
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`rsol<ohl—PTAB@skgf.com
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`lgordon-PTAB@sl<gf.com
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`rbemben—PTAB@skgf.com
`
`FOR:
`
`IBG LLC
`
`SIGNATURE:
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`4; -21
`
`_
`
`BY:
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`44/’/a’.Aijm Cc/rrmwrr!..’
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`TITLE:
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`£1-fi0’C/J7? éfis/t’¢€t
`
`(at/«J54
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`DATE:
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`7'/a- /2"