`
`In re Patent of:
`U.S. Patent No.2
`Issue Date:
`Appl. Serial No.2
`Filing Date:
`Title:
`
`Friesen. et al.
`7.533.056
`May 12. 2009
`1 1/41 7,544
`May 3, 2006
`USER INTERFACE FOR AN ELECTRONIC TRADING SYSTEM
`
`Mail Stop Patent Board
`Patent Trial and Appeal Board
`U.S. Patent and Trademark Office
`P.O. Box 1450
`
`Alexandria, VA 22313-1450
`
`PETITIONER’S POWER OF ATTORNEY IN POST GRANT PROCEEDINGS BEFORE
`THE PATENT TRIAL AND APPEAL BOARD
`
`Petitioners, TradeStation Group. Inc. and TradeStation Securities, lnc., each hereby
`
`appoints the following practitioners as its attorneys to transact all business in the United States
`Patent & Trademark Office associated with any inter partes review, covered business method
`
`review, post grant review, or other review proceedings before the Patent Trial and Appeal Board
`
`of the above-captioned patent:
`
`John C. Phillips. Reg. No. 35.322
`
`and all practitioners associated with PTO Customer Number 26171.
`
`I have the authority to execute this document on behalf of TradeStation Group, Inc. and
`
`Tradestation Securities, Inc.