Security Interest Release

Recorded: 2005-02-28 Received: 2005-02-28 Pages: 9

Assignors

ARGC VI, L.P.

Executed: 2005-02-22

Executed: 2005-02-22

NOKIA VENTURE PARTNERS II, L.P.

Executed: 2005-02-22

NVP II AFFILIATES FUND, L.P.

Executed: 2005-02-22

ST. PAUL VENTURE CAPITAL IV, LLC

Executed: 2005-02-22

Assignee

PROQUENT SYSTEMS CORPORATION

400 NICKERSON ROAD, CHIEF EXECUTIVE OFFICER, MARLBOROUGH, MA, 01752, UNITED STATES

Covered Properties (6)

Application program interface

Application: 10/100,468 →

Management of message queues

Application: 10/077,083 →

Service platform on wireless network

Application: 10/061,524 →

Platform and method for providing wireless data services

Application: 10/061,953 →

Packet switched data service on a wireless network

Application: 10/061,526 →

Transaction based packet switched data service on a wireless network

Application: 10/066,156 →