CERTIFICATE OF LIMITED PARTNERSHIP 1. The name of the limited partnership is DAH-IP Acquisition Co., L.P. 2. The address of the registered office is 350 N. St. Paul Street, Dallas, Texas 75201 3. The name of the registered agent at the above address is CT Corporation System. 4. The address where the records of the limited partnership are to be kept or made available (pursuant to TRLPA art. 6132a-1, sec. 1.07) is 2361 Rosecrans Avenue, Suite 180, El Segundo, California 90245 5. The name, mailing address and street address of the business or residence of each general partner is as follows: Business or Residence General Partner Mailing Address Street Address --------------- --------------- --------------- DAH-IP Holdings, Inc. 2361 Rosecrans Avenue 2361 Rosecrans Avenue Suite 180 Suite 180 El Segundo, CA 90401 El Segundo, CA 90401 DAH-IP Acquisition Co., L.P. BY: DAH-IP Holdings, Inc. /s/ RICHARD J. KAPLAN ---------------------- By: Richard J. Kaplan Chief Financial Officer And Secretary