1 EXHIBIT 10.20 PFIZER ROYALTY FREE LICENSE This AGREEMENT is entered into as of April 1, 1986 by and between PFIZER INC. ("PFIZER"), a Delaware corporation having an office at 235 East 42nd Street, New York, New York 10017, and ONCOGENE SCIENCE, INC....Pfizer Royalty Free License • December 20th, 1995 • Oncogene Science Inc • In vitro & in vivo diagnostic substances • New York
