`
`BEFORE THE PATENT TRIAL AND APPEAL BOARD
`
`PHIGENIX, INC.
`Petitioner
`
`V.
`
`IMMUNOGEN, INC.
`Patent Owner
`
`IPR2014-00676
`
`Patent 8,337,856
`
`IMMUNOGEN, INC.’S POWER OF ATTORNEY
`
`Mail Stop "PA TENT BOARD"
`Patent Trial and Appeal Board
`US. Patent and Trademark Office
`
`PO. Box 1450
`
`Alexandria, VA 22313-1450
`
`
`
`ImmunoGen, Inc.'s Power of Attorney
`
`Pursuant to 37 C.F.R. § 42.10(b), Patent Owner, ImmunoGen, Inc., having a
`
`principal place of business at 830 Winter Street, Waltham, MA 02451-1477, hereby
`
`appoints the following practitioners as its attorneys to transact all business in the
`
`United States Patent & Trademark Office associated with an inter partes review of
`
`US. Patent No. 8,337,856:
`
`Lead Counsel:
`
`Eldora L. Ellison (Reg. No. 39,967) phone: 202.772.8508
`
`Back-up Counsel: Eric K. Steffe
`
`(Reg. No. 36,688)
`
`phone: 202.772.8625
`
`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)
`
`eellison—PTAB@skgf.com
`
`esteffe-PTAB@skgf.com
`
`
`FOR: ImmunoGen Inc.
`
`SIGNATUREMW
`BY:
`Joseph J. Iéémy
`.
`
`TITLE: Chief Patent Counsel and Asst. Secretary
`
`DATE: May 13, 2014
`
`
`
`ImmunoGen, Inc.'s Power of Attorney
`
`CERTIFICATION OF SERVICE (37 C.F.R. § 42.6(en
`
`The undersigned hereby certifies that the above-captioned ImmunoGen,
`
`Inc.’s Power of Attorney, was served in its entirety on May 13, 2014, upon the
`
`following parties via FedEX®z
`
`Ping Wang
`ANDREWS KURTH, LLP
`
`1350 I Street NW, Suite 1100
`Washington, DC 20005
`Tel: (202) 662-3042
`Fax: (202) 662-3729
`PingWang@andrewskurth.com
`
`Gregory Porter
`ANDREWS KURTH, LLP
`600 Travis, Suite 4200
`Houston, TX 77002
`
`Tel: (713) 220-4621
`Fax: (713) 220-4257
`GregPorter@andrewskurth.com
`
`STERNE, KESSLER, GOLDSTEIN & FOX P.L.L.C.
`
`/Eldora L. Ellison/
`
`Date: May 13, 2014
`
`Eldora L. Ellison, Ph.D.
`
`1100 New York Avenue, NW.
`
`Registration No. 39,967
`
`Lead Attorney for ImmunoGen, Inc.
`
`Washington, D.C.20005-3934
`
`(202) 371-2600
`
`18463251
`
`