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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
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`____________________
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`Patent No. 7,676,411
`_____________________
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`TRADESTATION SECURITIES, INC.’S
`POWER OF ATTORNEY PURSUANT TO 37 C.F.R. §42.10(b)
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`Mail Stop “PATENT BOARD”
`Patent Trial and Appeal Board
`U.S. Patent and Trademark Office
`P.O. Box 1450
`Alexandria, VA 22313-1450
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`BEFORE THE PATENT TRIAL AND APPEAL BOARD
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`U.S. Patent No. 7,676,411
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`Pursuant to 37 C.F.R. § 42. l0(b), Petitioner TradeStation Securities, Inc.,
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`having a principal place of business at 8050 SW 10th Street, Suite 2000,
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`Plantation, FL 33324, hereby appoints the practitioners of Customer No. 26111 as
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`its attorneys to transact all business in the United States Patent & Trademark
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`Office associated with the covered business method review of U.S. Patent No.
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`7,676,4l 1. These attorneys include at least:
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`Lead Counsel:
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`Back-up Counsel:
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`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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`rsokohl-PTAB@skgf.com
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`lgordon—PTAB@skgf.com
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`rbemben-PTAB@skgf.com
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`FOR:
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`TradeStation Securities Inc.
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`SIGNATURE: '
`BY:
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`TITLE:
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`DATE:
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