1 Exhibit 10.21 DEED OF ASSIGNMENT ------------------ BETWEEN: Telxon Corporation of 3330 West Market Street, P.O. Box 5582, Akron, OH 44334-0582, U.S.A. (the "Assignor") and Aironet Wireless Communications, Inc. of 3875 Embassy Parkway, OH 44334-0292, U.S.A. (the "Assignee") In consideration of the sum of NIS 10.00 (Ten New Israel Shekels) paid to us, the Assignor, we hereby assign, transfer and set over to the Assignee, all of our right, title and interest in and to Israel Patent Application No. 127628 for "Cellular System Hand-Off Protocol" And we, the said Assignee, hereby accept the said assignment. IN WITNESS WHEREOF WE HAVE SET OUR HAND THIS 4th DAY OF AUGUST, 1999 - ------------------------------------------------------- Assignor Telxon Corporation - ------------------------------------------------------- signature /s/Glenn S. Hansen - ------------------------------------------------------- name of person signing Glenn S. Hansen - ------------------------------------------------------- Vice President, position of person signing Legal Administration - ------------------------------------------------------- - ------------------------------------------------------- Assignee Aironet Wireless Communications, Inc. - ------------------------------------------------------- signature /s/Roger J. Murphy - ------------------------------------------------------- name of person signing Roger J. Murphy - ------------------------------------------------------- position of person signing President and CEO - -------------------------------------------------------