EXHIBIT 12 STOCK PURCHASE AGREEMENT THIS STOCK PURCHASE AGREEMENT (the "Agreement") is made and entered into this 31st day of December, 2001, by and between (i) Wi-LAN, INC., a Canadian corporation with a principal office address located at 2891...Stock Purchase Agreement • January 7th, 2002 • Wi Lan Inc • Telephone & telegraph apparatus
PLEDGE AGREEMENT OF DIGITAL TRANSMISSION SYSTEMS, INC. 401(K) AND EMPLOYEE STOCK OWNERSHIP PLAN AND TRUSTPledge Agreement • January 7th, 2002 • Wi Lan Inc • Telephone & telegraph apparatus • Delaware
