FOURTH AMENDMENT TO CONVERTIBLE SECURED PROMISSORY NOTE THIS FOURTH AMENDMENT TO CONVERTIBLE SECURED PROMISSORY NOTE (the "FOURTH AMENDMENT") is made and entered into as of July 26, 2005, by and among NORTHWEST BIOTHERAPEUTICS, INC., a Delaware...Convertible Secured Promissory Note • August 1st, 2005 • Northwest Biotherapeutics Inc • Pharmaceutical preparations • Washington
SECOND AMENDMENT TO CONVERTIBLE SECURED PROMISSORY NOTE THIS SECOND AMENDMENT TO CONVERTIBLE SECURED PROMISSORY NOTE (the "Second Amendment") is made and entered into as of April 12, 2005, by and among NORTHWEST BIOTHERAPEUTICS, INC., a Delaware...Convertible Secured Promissory Note • April 15th, 2005 • Northwest Biotherapeutics Inc • Pharmaceutical preparations • Washington