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Key practice areas
Patent
Patent prosecution
Firm overview

HG Law started as the patent practice spin-off from Ropes & Gray LLP. The HG Law team has extensive experience with representing clients of all sizes and across a multitude of industries around the globe in connection with intellectual property matters. All of our attorneys and patent agents have technical and scientific backgrounds, many of whom have graduate degrees. We are used to counseling and representing clients on high stakes complex matters – relying on both our legal analysis expertise and technological know-how.

We tailor our relationship for every one of our clients, recognizing that a cookie-cutter approach to IP representations is not adequate. We make it a point to understand our client’s business, its needs, and its goals. This underpins the work that we perform in the course of our representation.

HG Law is selective in hiring talented candidates with exceptional legal and technical/scientific backgrounds. We invest in our legal team and support staff. This includes providing each person with opportunities to work on a wide scope of projects in addition to specializing in a respective practice area. HG Law has developed an environment that fosters professional development and collegiality.

As a client, this means your matters will be handled by a team of HG Law professionals with a broad range of experience, who are able to learn about your business and your needs. This institutional knowledge will be a continuous mainstay during the course of our representation.

Address:
75 Broad Street, Suite 1000
New York, NY 10004
Tel:+1 646 973 2500 Fax:+1 646 219 6229 Web Address:https://www.hglaw.com/

IPS Sponsored

  • Sponsored by HG Law
Overview

Haley Guiliano team has extensive experience representing clients of all sizes and across a multitude of industries around the globe in connection with intellectual property matters. The firm has notable expertise in the life sciences industry.

Notable patent practitioners: James Haley, Karen Mangasarian, Brian Gummow.

Haley practices worldwide procurement, defense, and enforcement of patents in the biotechnology, biopharmaceutical, pharmaceutical, and chemical industries.

Mangasarian has extensive experience in the management of patent portfolios worldwide, patent life cycle management, and the development of competitive patent strategies.

Testimonials

2026

"They provide accurate, timely legal advice.  They consider the business needs of my company.  They are proactive in aligning their legal advice with out IP Strategy, and in helping my company refine its IP Strategy.  They are quick to anticipate and adjust to changing business needs.  Their team is diverse." 

Saeed Gholhaki

"Draft patent applications, craft office action responses, obtain allowances over close prior art, quickly understanding complex new inventions, providing legal advice with an understanding of our business and IP strategy."

 

2025

"They are very knowledgeable, produce high quality work and have reasonable rates."

James Leiz

"Jim is very knowledgeable and leads a team that delivers high quality patent applications."

 

Linked Reviews
Patent

The firm ws active recently drating patent applications for all aspects of Rivian’s electronic vehicles. The firm also assists Genentech with post-grant challenges to its patents.

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Amongst a sea of mergers, Lathrop GPM and HG Law have set out plans to combine, positioning themselves to compete with both IP boutiques and full-service firms
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