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Heungsoo Choi

Heungsoo is a partner in our San Diego Office.  He has over 21 years of experience in U.S. IP laws and over 4 years of experience in Korean patent law in various technologies including medical device, electrical, computer, telecommunication and semiconductor areas.

Heungsoo was named among best lawyers by “The Best Lawyers in America” (One to Watch category) in 2022.

His practice is focused on strategic patent procurement with a strong emphasis on strategic claim drafting for quick allowance (frequently combined with faster track examination) and USPTO examiner interviews, building and managing a complex patent portfolio (domestic and international), appeals to the PTAB, Ex Parte reexamination, broadening reissue, landscape analysis, due diligence, opinions, non-infringement and invalidity analysis, position paper, and sending and responding to cease and desist letters.  Heungsoo has extensive international practice, including Asia and Europe.  He regularly visits Korea and gives presentations regarding U.S. intellectual property matters.  Heungsoo also has experience in reviewing and revising IP agreements such as non-disclosure agreements, consulting agreements, manufacturing agreements, supply agreements, joint development agreements, software development agreements and licensing agreements.

He also has experience in filing and prosecuting trademark applications and preparing and/or reviewing trademark license agreements.

Heungsoo also coordinated managing multiple state court litigations relating to breach of contract and copyright infringement involving consumer electrical devices and computer software.

He currently represents clients ranging from Fortune 500 companies to start-up companies (he is currently working with many startups).  He has experience and knowledge in a wide range of technologies including: electrical, telecommunication, computer (hardware/software), semiconductor and medical devices. Specifically, Heungsoo has experience in variety of technologies including (but not limited to):

Artificial intelligence (AI) (machine learning/deep learning)
Various medical device and related technologies

Medical image analysis using AI
AI based health management system
AI based virtual medical assistant
Robotic surgery system
Cryo-anesthesia device
Glucose monitoring technology
Electrotherapy system
Needleless syringe using pyrotechnic mechanism
Smart braille devices for the visually impaired
Vibratory nerve exciter
Tracheostomy tube
Humidifier for use in respiratory care, acute care surgery and the treatment of obstructive sleep apnea.
Wearable device such as smart watch
Spinal nerve ablation technology


Autonomous driving technology
AI based pedestrian-to-vehicle collision avoidance system
Electric power steering system for vehicles
Advanced driver assistance system (ADAS)
Vehicle suspension system

Various computer software technologies

Computer based personalized delivery of various content including audio and video files
Data/image processing using AI
On-line education system
Natural language response technology
Distributed software-defined network (DSDN)

Wireless and telecommunication technologies

Wireless power charging system
Wireless power overvoltage protection circuit
Wireless LAN
Satellite communication system
Push-to-talk based radio frequency communication system
Wireless high-definition video system

Energy storage devices

Secondary battery
Fuel cell
Solar cell

Display technology

Augmented reality (AR) and Virtual reality (VR)
Plasma panel display
Liquid Crystal Display (LCD)
Organic Light Emitting Diode (OLED) display
Quantum dots display
Stereoscopic display
Digital/Internet TV

Data storage system

Solid state drive (SSD)
Magnetic storage device
Optical storage device such as CD/DVD

Semiconductor manufacturing

Thin film deposition technology such as atomic layer deposition
Substrate inspection system

Sensing system

LIDAR (light detection and ranging) system
Gesture recognition system
Pressure sensor array
Piezoelectric sensor

Other electrical and computer technologies

Internet of Things (IoT) system
Multi-function peripheral device
Electronic payment system based on barcode
Various electrical components
PWM amplifier systems.
Exercise/workout guide system

Prior to joining the firm, Heungsoo worked as a Korean Patent Attorney in one of the largest Korean IP firms for over four years, where he prosecuted numerous patent applications relating to the digital media, signal processing and consumer electronics for the largest Korean technology company. He was also the chief of an electrical patent department of the Korean firm where he handled various fields of technologies including electrical, computer, software, Internet, data processing, computer networks, telecommunications, and business method patents.

Below are Heungsoo’s selected accomplishments that helped patent owners/practicing entities:

Assisted with building a large patent portfolio for world’s largest flat panel display manufacturer and the world leader in secondary battery technology
Lead U.S. counsel for the world-leading research institute in the world’s most cutting-edge industry
Assisted a medical device company regarding comprehensive landscape analysis for strategic acquisition in spinal nerve ablation technology
Assisted a world leading healthcare company in non-infringement/invalidity analysis of competitor’s patent
Assisting a world class energy storage device manufacturer in building U.S. patent portfolio
Assisting a large medical device company in building U.S. patent portfolio 
Assisting multiple start-ups and small sized companies in building U.S. and worldwide IP portfolios 


Yonsei University – Graduate School of Engineering, M.E., Electrical Engineering
Seoul National University, B.S., Atmospheric Science, Substantive study in physics and general engineering; Three consecutive scholarships for academic excellence
University of San Diego School of Law (USD), J.D.
Korean Intellectual Property Office and the Patent Court
State Bar of California
U.S. Patent and Trademark Office
Chemical, Industrial & Materials

Automation & Robotics


Fuel Cells & Batteries


Communications Technology

Cellular Networking & Communications

Fiber Optic Networks

Internet Telephony

Low-Power Networks




Wireless Local Area Networks

Electrical, Semiconductor & Computer Technology

Electronics & Semiconductors

Healthcare Information Technology

Software & IT


Clean Technology

Energy Efficient Technologies

Solar Power

Waste Mitigation & Treatment

Financial Services & Business Methods

Blockchain & Smart Contracts

Cloud Computing

Medical Devices & Procedures

Ablation Technology

AI & Machine Learning

Glucose Monitoring & Insulin Infusion



Medical Informatics & Software Systems

Minimally Invasive & Endoscopic Procedures



Ophthalmology & Eye Care


Surgical Equipment

Brand Search
Design Patents
Due Diligence
Global Portfolio Management
Infringement Risk 
IP Strategy
IP Transactions and Agreements
Opinions Counseling
Patent Strategy & Prosecution
PTAB Overview
Tech Transactions
Trademark & Brand Protection
Trademark Registration
U.S. Patent Prosecution

  • Named to the Best Lawyers: Ones to Watch guide, which “recognizes lawyers who are earlier in their careers for their outstanding professional excellence in private practice”, for Patent Law (2021 – 2024)
  • Asian Patent Attorneys Association
  • Pan Asian Lawyers Association – San Diego (PAL-SD)
  • Korean American Bar Association – San Diego (KABA-SD)
  • Korean-American Scientists and Engineers Association
  • Seoul National University Alumni Association, San Diego, California
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