Justin T.
Darrow

Of Counsel
JUSTIN@KXTLAW.COM
650-466-6376
vCard
Justin T. Darrow

Justin T. Darrow, Ph.D., concentrates his practice on intellectual property law. Dr. Darrow has experience with patent preparation and prosecution, portfolio management, client counseling, patent mining, pre-litigation counseling, freedom to operate analysis, patent non-infringement analysis opinions, patent validity opinions, licensing, reissue applications, ex parte reexamintion, and patent litigation. Dr. Darrow has practiced as an Intellectual Property Attorney at law firms and has served as in-house Counsel for government contractors. Dr. Darrow has been involved in a wide variety of technologies including in image processing, image enhancement, virtual reality, augmented reality, mixed reality, artificial intelligence (AI), machine learning (ML), autonomous vehicles, Internet of Thing (IoT), big data analytics, cloud computing, wireless communications, emergency response, digital rights management, cybersecurity, sensors, content delivery, databases, graphical user interfaces (GUIs), computer and software architecture, networks, optical communications, bioinformatics, nanotechnology, clean energy, and semiconductor devices.

In government service, Dr. Darrow was a Patent Attorney at the Patent Trial and Appeal Board (PTAB) at the United States Patent and Trademark Office (USPTO) involved in ex parte appeals in all electrical technologies. Before this position, Dr. Darrow was a Primary Patent Examiner in cybersecurity at the USPTO and served in career details at the Office of the Solicitor, the Central Reexamination Unit, and the PTAB.

Prior to his legal career, Dr. Darrow worked in corporate research and development as a Senior Scientist at 3D Systems (diode-pumped solid-state ultraviolet laser systems for stereolithography for three-dimensional printing and rapid prototyping), Candela Corporation (laser systems for dermatology), and Raytheon Company (diode-pumped solid-state mid-infrared laser systems for transmitters for airborne laser radar), and as a research assistant at Amoco Corporation (picosecond near-infrared solid-state laser systems for high-speed device characterization).

In academics, Dr. Darrow conducted postdoctoral research in relativistic interactions of terawatt, picosecond laser pulses generated with chirped pulse amplification with electron beams and plasmas capable of semiconductor fabrication in collaboration with the University of Michigan and the U.S. Naval Research Laboratory. In graduate research, Dr. Darrow studied terahertz radiation generated and detected by large aperture photoconducting antennas triggered by femtosecond laser pulses and techniques to use terahertz radiation for characterization of Group III-V and II-VI semiconductors at Columbia University.

Georgetown University Law Center
J.D.
Columbia University
Ph.D., Applied Physics
The University of Chicago
M.S., Physics
Columbia College
B.A., Physics, Magna Cum Laude
ADMISSIONS
District of Columbia
State of Virginia
State of New Jersey
U.S. Supreme Court
U.S. Court of Appeals for the Federal Circuit
U.S. District Court for the District of Columbia
U.S. District Court for the Eastern District of Virginia
U.S. District Court for the District of New Jersey
United States Patent and Trademark Office (USPTO)
LANGUAGES
English
Publications
• Author, “Patent Eligibility and Protection of Propagating Functional Signals,” 89 J. PAT. & TRADEMARK OFF. SOC’Y 93, February 2007
• Co-Author, “Large-Aperture Photoconducting Antennas Excited by High Optical Fluences,” Ultrafast Pulse Generation and Spectroscopy, 1861 PROCEEDINGS OF THE SOCIETY OF PHOTO INSTRUMENTATION ENGINEERS, 186, January 1993
• Author, “Generation and Detection of Terahertz Radiation with Large-Aperture Photoconducting Antennas,” Ph.D. Thesis, Columbia University, UNIVERSITY MICROFILMS INC. (UMI) Dissertation • Information Service Order No. 9231992), May 1992
• Co-Author, “Saturation Properties of Large-Aperture, Photoconducting Antennas,” IEEE J. QUANTUM ELECTRON., vol. 28, no. 6, 1607, June 1992
• Co-Author, “Saturation Properties of Large-Aperture Photoconducting Antennas, DIGEST OF THE CONFERENCE ON LASERS AND ELECTRO-OPTICS, paper JFA1, May1991
• Co-Author, “Power Scaling of Large-Aperture Photoconducting Antennas,” 58 APPL. PHYS. LETT., 25, April 1991
• Co-Author, “Subpicosecond Electromagnetic Pulses from Large-Aperture Photoconducting Antennas,” 15 OPT. LETT., 323, May 1990
• Co-Author, “Active and Synchronous Mode Locking of a Room-Temperature cw Titanium Sapphire Laser,” DIGEST OF THE CONFERENCE ON LASERS AND ELECTRO-OPTICS, paper ME1, May 1988
• Co-Author, “cw Mode Locking of a Room-Temperature, Tunable, Solid-State Laser,” PROCEEDINGS OF TUNABLE SOLID-STATE LASERS III CONFERENCE, paper PD-2, October 1987