EXHIBIT 2.1] STOCK PURCHASE AGREEMENT BY AND AMONG ADVANCED PHOTONIX, INC. AND TEXAS OPTOELECTRONICS, INC. STOCK PURCHASE AGREEMENT (the "Agreement") dated January 17, 2003 by and among ADVANCED PHOTONIX, INC., a Delaware corporation (hereinafter...Stock Purchase Agreement • January 31st, 2003 • Advanced Photonix Inc • Semiconductors & related devices • Delaware
