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Seongyoune (Sean) Kang

Sean is the founder of Quantum Patent Law Firm and is a patent attorney with over 15 years of experience in the field of patent law.  Prior to founding the firm, Sean accumulated an abundance of experience working at Oblon, McClelland, Maier & Neustadt, LLP, an IP boutique firm that is a leader in U.S. patent grants, and Pearne & Gordon, LLP, an IP boutique firm with a history of over 100 years.  He also worked in-house at Schlumberger, the largest oilfield services company in the world, and managed a global patent portfolio relating to dynamic pressure management, drill cuttings management, and fluid processing. 

In his career, Sean has drafted over 100 patent applications and has prosecuted to allowance applications in the fields of automotive technology, turbomachinery, semiconductor manufacturing, display panel manufacturing, robots, medical devices, imaging technology, home appliances, lighting systems, horology, eyewear, etc.  Sean also has extensive experience advising clients regarding non-infringement, invalidity and patentability and utilizing the Examiner's search system (EAST) to personally conduct prior art searches. 

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Sean is admitted to practice in the District of Columbia, California, and Ohio and is registered to practice before the United States Patent and Trademark Office.  Sean is a native speaker of Korean and has advanced proficiency in French.

Sean obtained his Juris Doctor from the Ohio State University Moritz College of Law and his B.S. in mechanical and aerospace engineering from Seoul National University.

Hyojin (Jean) Lee

Jean is a foreign attorney at Quantum Patent Law Firm and is admitted to the Korea bar.  Prior to joining the Quantum Firm, Jean worked for a law firm in Seoul, Korea counseling international and domestic clients in areas of commercial transactions and white-collar crime.  During her undergraduate studies and law school, she studied at Kyoto University and Stanford Japan Center as an exchange student through the Kyoto Consortium for Japanese Studies Program and had internships at the Ministry of Foreign Affairs of Korea, the Constitutional Court of Korea, and the Hong Kong International Arbitration Center.

Jean obtained her Juris Doctor from Ewha Womans* University Law School in Seoul, Korea and her B.A. in Foreign Affairs from the University of Virginia.


Jean is also registered to practice before the Korea Intellectual Property Office.  She is a native speaker of Korean and has advanced proficiency in Japanese.​

* proper noun

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