U.S. Patent Services for Foreign Clients
Strategic U.S. patent prosecution for foreign applicants, law firms, and in-house IP teams
AddyHart's Divergent practice partners with foreign associates, multinational companies, research institutions, and innovators seeking patent protection in the United States. We provide responsive, transparent, and technically sophisticated representation before the U.S. Patent and Trademark Office, helping clients navigate every stage of U.S. patent prosecution with predictable pricing and clear communication.
U.S. Patent Services for International Applicants
We work closely with foreign associates, multinational companies, research institutions, and in-house intellectual property teams to develop U.S. patent prosecution strategies that complement broader international portfolios. We provide experienced representation throughout every stage of the U.S. patent process:
Entering the U.S.
PCT National Stage Entry
Direct U.S. Filings
Filing Strategy
Portfolio Coordination
Patent Prosecution
Office Action Responses
Examiner Interviews
Restriction & Election Practice
IDS & Continuations
Advanced Proceedings
Ex Parte Appeals
PTAB Proceedings
Federal Circuit Appeals
Global Portfolio Strategy
Whether entering the U.S. through the PCT national stage, responding to an Office Action, or coordinating global portfolio strategy, we work closely with foreign associates and applicants to provide efficient, reliable U.S. patent prosecution. Our goal is to serve as an extension of your team while delivering clear advice, predictable budgets, and timely work product.
Transparent Pricing
We believe clients should understand the expected cost of patent prosecution before work begins. Many of our most common services are offered at predetermined professional fees, allowing clients to budget with confidence and avoid unexpected billing.
$500 USD- AddyHart professional fee only; USPTO and third-party costs are separate
$0 USD — AddyHart professional fee only; USPTO and third-party costs are separate
$0 USD — AddyHart professional fee only; USPTO and third-party costs are separate
Why Foreign Associates
Choose Divergent
Experienced Attorneys
Our attorneys remain substantively involved in understanding the invention, developing the claims, interviewing examiners, and advising clients about consequential prosecution decisions.
Comparative Perspective
Our attorneys regularly advise clients on the practical differences between U.S. patent practice and the procedures of major foreign patent offices, including the EPO, JPO, KIPO, and CNIPA. Through our comparative publications and prosecution experience, we help foreign applicants develop U.S. strategies that complement broader international portfolio objectives.
Responsive Service
We understand that timely communication is essential when coordinating prosecution across jurisdictions. Our team provides prompt reporting, predictable turnaround times, and clear recommendations, allowing foreign associates and in-house IP teams to manage U.S. prosecution efficiently and keep global portfolios moving forward.
Technical Depth
Our attorneys have experience representing innovations across software, artificial intelligence, semiconductors, medical devices, industrial automation, telecommunications, advanced manufacturing, and other complex technologies. This technical foundation allows us to quickly understand new inventions and provide practical, informed guidance throughout U.S. patent prosecution.
Transparent Pricing
We believe clients should understand the expected cost of U.S. patent prosecution before work begins. Many of our most common services are offered at fixed or predetermined professional fees, providing predictable budgets while eliminating unnecessary charges for routine administrative work.
Foreign Client Services
Relevant Team
The professionals below advise foreign applicants and associates on U.S. national-stage entry, USPTO prosecution, appeals, and cross-border portfolio coordination.
Gregory B. Gulliver
Partner · Registered Patent Attorney · Former Software Engineer
A former software engineer with nine years of industry experience, Gregory has prepared and prosecuted hundreds of applications involving wireless communications, software, computer hardware, semiconductors, and network technologies.
Brandon R. Theiss
Partner · Registered Patent Attorney · Licensed Professional Engineer
A licensed professional engineer and former industrial-control and medical-device engineer, Brandon advises on patent prosecution, § 101 strategy, portfolio development, and post-grant proceedings involving AI, software, cloud systems, medical devices, and automation.
Michael K. Kelly
Partner · Registered Patent Attorney · Electrical & Industrial Engineering
An electrical and industrial engineer with more than 30 years of experience, Michael has prosecuted hundreds of applications and coordinated patent protection across Europe and Asia for semiconductors, aerospace systems, medical devices, software, and cloud technologies.
Robert Hyun Chang
Of Counsel · Registered Patent Attorney · Materials Engineer
A registered patent attorney with more than 25 years of intellectual-property experience and degrees in metallurgical and materials science engineering and physics, Robert helps technology companies draft and prosecute U.S. patent applications, build and monetize portfolios, and develop claim and licensing strategies grounded in complex technology and commercial objectives.
Danielle Gross, Ph.D.
Registered Patent Agent · Ph.D. in Biochemistry · Life Sciences & Medical Devices
A registered patent agent with more than a decade of prosecution experience and a Ph.D. in Biochemistry, Danielle helps life-sciences and technology companies draft and prosecute U.S. patent applications, build portfolios, and develop claim strategies grounded in complex science.
Comparative Resources
Our attorneys regularly publish practical insights comparing U.S. patent practice with major international patent offices, helping foreign applicants and associates better understand the procedures, strategies, and considerations involved in obtaining U.S. patent protection.
Get In Touch
Whether you are developing a new patent portfolio, transferring existing prosecution work, preparing for a product launch, or responding to a challenge against an issued patent, we would welcome the opportunity to discuss your objectives.
Please do not include confidential information in an initial inquiry. An attorney-client relationship is formed only through a written engagement agreement.