definiens: shall mean, except as set forth on Appendix D, tangible materials(including, but not limited to, pharmaceutical, chemical and biochemical products ) ( collectively, the ) discovered, developed or acquired by or on behalf of SCHLESSINGER, LAX, the SCHLESSINGER LAB or the LAXLAB ( including, for the avoidance of doubt, under the RESEARCH AGREEMENT ) prior to or after the ORIGINALLICENSE AGREEMENT EFFECTIVE DATE that may be used for the discovery, development, selection, improvement of or use as an RTK PRODUCT or LICENSED METHOD, that is provided to LICENSEE bySCHLESSINGER, LAX, the SCHLESSINGER LAB or the LAX LAB and that, with respect to such materials that arediscovered, developed or acquired after the EFFECTIVE DATE, are discovered, developed or acquired whileSCHLESSINGER is or was MEANINGFULLY INVOLVED AT YALE and MEANINGFULLY INVOLVED AT KOLLTAN . To the extent that any materials provided by SCHLESSINGER, LAX, the SCHLESSINGER LAB or the LAX LAB toLICENSEE after the EFFECTIVE DATE are not owned 100 % by YALE, YALE shall, at the time such materials areprovided to LICENSEE, notify LICENSEE of such fact in writing ( with such notice identifying the source of suchmaterials and which other party(ies ) might have an ownership interest in such materials ) and this definition shall onlyapply to the extent of YALE ’s ownership interest in such materials