Exhibit 10.31 AGREEMENT OF SALE THIS AGREEMENT OF SALE (this "Agreement"), is effective as of the 23rd day of June, 1999, by and between MECHANICAL TECHNOLOGY INCORPORATED ("MTI") a New York Corporation ("Seller"), and PLUG POWER, LLC, a Delaware...10.31 Agreement of Sale • August 6th, 1999 • Mechanical Technology Inc • Measuring & controlling devices, nec • New York
WITNESSETH:Assignment and Assumption Agreement • August 6th, 1999 • Mechanical Technology Inc • Measuring & controlling devices, nec • New York
