JOINT FILING AGREEMENTJoint Filing Agreement • December 11th, 1997 • White Rock Capital Management Lp • Patent owners & lessors
Contract Type FiledDecember 11th, 1997 Company IndustryThe undersigned hereby agree that the statement on Schedule 13D with respect to the Common Stock of IGEN International, Inc. dated December 11, 1997 is, and any amendments thereto signed by each of the undersigned shall be, filed on behalf of us pursuant to and in accordance with the provisions of Rule 13d-1(f) under the Securities Exchange Act of 1934.