Marek, Please contact Unisys and report back to us. Welch Patent Licensing Department; Unisys; Mail Stop C1SW19; P.O. Box 500, Blue Bell, PA 19424. Via the Internet, send E-mail to LZW_INFO@UNISYS.COM, or use a form available on the Contact Page of the Unisys Web Server to request follow-up information. The URL for the contact form is http://www.unisys.com./ServerInformation/contact/contact2.html . Thanks Bruce