`
`BEFORE THE PATENT TRIAL AND APPEAL BOARD
`
`IBG LLC; INTERACTIVE BROKERS LLC; TRADESTATION GROUP, INC.;
`
`TRADESTATION SECURITIES, INC. ;
`
`TRADESTATION TECHNOLOGIES, INC.; and IBFX, INC.
`Petitioners
`
`V.
`
`I TRADING TECHNOLOGIES INTERNATIONAL, INC.
`Patent Owner
`’
`
`I.
`
`Patent No. 6,772,132
`
`POWER OF ATTORNEY PURSUANT TO 37 C.F.R. §42.10(b)
`
`IBG LLC’S
`
`Mail Stop “PA TENT BOARD”
`Patent Trial and Appeal Board
`US. Patent and Trademark Office
`
`P.O. Box 1450
`
`‘
`
`Alexandria, VA 22313-1450
`
`
`
`U.S. Patent No. 6,772,132
`
`Pursuant to 37 C.F.R. § 42.10(b), Petitioner IBG 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. 6,772,132. 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)
`
`ph: 202.772.8677
`ph: 202.772.8862
`ph: 202.772.8549
`
`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.com
`
`lgordon-PTAB@skgf.com
`
`rbemben—PTAB@sl<gf.com '
`
`FOR:
`
`IBG LLC
`
`SIGNATURE: % 4
`
`'2
`
`I BY:
`
`5/4/.44/ya, 6e/mm,»././J
`
`‘
`
`TITLE:
`
`Ifijoc/67;’ ffrvffi Cawrxig
`
`- DATE:
`
`2- gp--/f
`
`'