Na Xu, Ph.D.

Managing Member | Patent Attorney | Attorney at Law
+1-703-539-2798
contact@us-ip.com

Dr. Na Xu is a patent attorney and the managing member of IPro, PLLC. She assists clients in all stages of patent prosecution before the United States Patent and Trademark Office (USPTO), including drafting patent applications, responding to office actions, and proceedings before to the Patent Trial and Appeal Board (PTAB).

She also counsels clients on patent-related business matters such as patent strategy, patent portfolio management, due diligence, patentability, patent enforcement, freedom-to-operate, and patent transactions.

Dr. Xu’s extensive technical experience spans across many fields including biology, genetics, chemistry, imaging, consumer electronics, medical device, renewable energy, and DNA sequencing.

Prior to her legal career, Dr. Xu was a research scientist with several academic institutions. Her research focused on stem cell and epigenetics.

Qian Gu, Ph.D.

Member | Patent Attorney | Attorney at Law
+1-617-512-5149
QGU@us-ip.com

Dr. Qian Gu is a patent attorney and a member of IPro, PLLC. He assists clients in all stages of patent prosecution before the United States Patent and Trademark Office (USPTO), including drafting patent applications, responding to office actions, and proceedings before to the Patent Trial and Appeal Board (PTAB). He also counsels clients on patent-related business matters such as patent strategy, patent portfolio management, due diligence, patentability, patent enforcement, freedom-to-operate, and patent transactions.

Dr. Gu has extensive technical experience in semiconductor, nanotechnology, materials science, physics, chemistry, and renewable energy.  He managed client matters involving a wide spectrum of technologies such as optical systems, photodetectors, medical device, MEMS, microfluidics, lithography, signal processing, algorithms, DNA sequencing, biochips, solar cells, power tools, garments and biomaterials.

Prior to joining IPro, Dr. Gu worked in the intellectual property sections of two large international law firms.  Before his law career, Dr. Gu was a scientist at the University of California, Santa Barbara, working on a renewable energy project funded by the Department of Defense and on a joint research program with a major U.S. defense contractor.  Dr. Gu also counseled a research subsidiary of a major Japanese conglomerate on their business strategy and technology research in renewable energy. Dr. Gu’s doctoral research at Harvard University focused on nanomaterials and nanoelectronics, including electronic devices based on single organic molecules and single oxide nanowires.

Khoi Nguyen

Counsel | Patent Attorney | Attorney at Law

Mr. Khoi Nguyen is a seasoned patent attorney with nearly two decades of experience in patent prosecution.  His work involves a broad spectrum of technologies in the electrical art.  In particular, he is an expert in patenting inventions in the semiconductor industry.  His clients include startups and large corporations such as IBM.  Mr. Nguyen also manages patent portfolios and advises clients on various matters in patent law. 

Thomas J. Siepmann, Ph.D.

Of Counsel | Patent Attorney | Attorney at Law

Dr. Siepmann’s experience includes nearly fifteen years of preparing and prosecuting patent applications, preparing validity, freedom-to-operate and infringement opinions, negotiating and executing patent licensing agreements, as well as post-grant work such as patent interference proceedings.

Dr. Siepmann’s legal experience began at small and medium-sized IP boutique law firms in Salt Lake City, Utah and the Washington, D.C. metropolitan area. At these firms, Dr. Siepmann’s practice focused on patent preparation and prosecution in genetics, material chemistry, polymer science, biologics (monoclonal antibodies and recombinant proteins), cellular immunology, virology, as well as various applications of classical biochemistry. Here, Dr. Siepmann also gained experience protecting innovations in the pharmaceutical field (compositions and methods of manufacture), the personal care industry (consumable products), and industrial chemistry (large scale organic chemistry).

Dr. Siepmann also has experience working at the large, general practice, domestic law firms Thompson Coburn, LLP and LeClairRyan, LLP where he served as Counsel and Partner. His patent drafting and prosecution work there focused on antibody technology, vaccine compositions, CAR-T therapy, cancer therapies, and neurological indications. In addition to his law firm experience, Dr. Siepmann was Director of Intellectual Property at Affymetrix, Inc. (now Thermo Fisher Scientific) in Santa Clara, California, where he managed global patent portfolios and played a key role in various corporate intellectual property matters. In addition to drafting patent applications in the fields of small molecule chemistry, nucleic acid chemistry, genetics, diagnostics, microparticle technology, lithography and photolithography, silica chip technology, and laboratory tools, Dr. Siepmann drafted and negotiated numerous patent licensing agreements, as well as scientific collaboration agreements, consortium agreements, and common material transfer and non-disclosure agreements.

Throughout his career, Dr. Siepmann sought opportunity to diversify his experience to provide him with a broad background in IP law. This broad training provides him with the capability of tackling almost any general question from the numerous disparate realms of intellectual property law. Working nearly a decade and a half at various law firms and a major biotechnology company, coupled with a diverse scientific training spanning over thirteen years, well equips Dr. Siepmann to assist with almost any intellectual property issue, especially in the fields of chemistry and biology.

Mark H. Henderson III

Of Counsel | Patent Attorney | Attorney at Law

Mark works with clients and foreign-qualified professionals worldwide to prepare and prosecute patent applications for inventions and designs in fields ranging from automotive powertrains and industrial processes to consumer products and medical devices. He also has experience representing clients in contested proceedings — including patent and trade secret litigation in U.S. federal court and the International Trade Commission (ITC), and patentability trials (e.g., IPR, PGR, and CBM proceedings) at the U.S. Patent Trial and Appeal Board (PTAB).

Jiong Yan

Technical Consultant
jyan@us-ip.com

Mr. Yan is a technical consultant at our firm.  Mr. Yan is not an attorney.  He brings into our practice his extensive technical experience in analog and digital circuit design, semiconductor fabrication process, failure analysis, nonvolatile memory development and testing, micro-controller development, nanotechnology, embedded system, and medical device.

Prior to joining us, Mr. Yan was a lead engineer in Texas Instruments and specialized in semiconductor device development, fabrication, assembly, testing and qualification. He also worked for SEMATECH on sub-nanometer high-k dielectric materials and process development.

Linda Chen, Ph.D.

Technical Consultant

Dr. Linda Chen started her career in intellectual property law in 2005 after graduating from the University of Toronto. In the past decade, she drafted or prosecuted thousands of patent applications in a wide variety of technical fields, including electronics, semiconductors, artificial intelligence, image processing, optical engineering, physics, telecommunication, electrochemistry and medical equipment. She also represented clients in numerous patent re-examination proceedings and patent invalidation proceedings before the State Intellectual Property Office of China (now the China National Intellectual Property Administration) and several patent litigations in Chinese courts.

Dr. Chen is a patent attorney licensed in China. She is not licensed in the U.S. She works under the supervision of our U.S.-licensed attorneys.