NOTE SUBSCRIPTION AGREEMENT This Note Subscription Agreement, dated as of the 9th day of October, 2023 (this “Agreement”), is entered into by and between Tecogen Inc., a Delaware corporation with offices located at 45 First Ave., Waltham, MA 02451...Note Subscription Agreement • October 10th, 2023 • Tecogen Inc. • Air-cond & warm air heatg equip & comm & indl refrig equip • Massachusetts
