Harry G. Direen, PhD, PE Expert Witness
Curriculum Vitae

Contact this Expert Witness

  • Company: Direen Tech Inc.
  • Phone: 877 869 5201
  • Cell: 719 321 6620
  • Fax: 719 352 3655
  • Website: www.direentech.com

Specialties & Experience of this Expert Witness

General Specialties:

Electrical Engineering and Software Engineering

Keywords/Search Terms:

Electronics, Control Systems, Embedded Systems, Robotics, Signal Processing, Drones, UAV, Software, Patents, Intellectual Property, Databases, Computers


PhD EE, University of Colorado; BS EE, University of california at Irvine

Years in Practice:


Number of Times Deposed/Testified in Last 4 Yrs:


Additional Information

Dr. Direen has over 35 years of experience as an engineer designing and developing systems in the electronics and software industry. He has significant experience as an expert witness supporting counsel and testifying in complex patent infringement cases. His expertise includes electronic systems, control systems; embedded systems design and development; databases; control of UAVs/Drones; product reverse engineering; and intellectual property. Dr. Direen has a broad base of knowledge in electronic and software systems gained from a long career developing a wide range of products and systems. Dr. Direen has reversed engineered a variety of complex systems over the years, including: media players, modems, modem compression algorithms, coriolis mass flow meters, database systems, and a range of other products to support patent infringement cases generating detailed claim charts and writing expert reports to demonstrate infringement. He has successfully discovered and analyzed complex digital signal processing algorithms and pertinent operations within these products. Dr. Direen has experience as an expert witness in multiple patent litigation cases, including cases involving encryption / decryption methods associated with databases and signal processing within a coriolis flow meter, surveillance, embedded control systems. Dr. Direen has a strong knack for being able to explain complex systems to laymen. Dr. Direen has taught engineering courses at the US Air Force Academy, and at the University of Colorado. Dr. Direen currently works with a research group at the US Air Force Academy developing control systems and image processing using GPGPUs for UAVs/Drones. Dr. Direen is an inventor on three patents.