What Does Amster, Rothstein & Ebenstein Do?

Total employees75
HeadquartersNew York
Founded1954

Amster, Rothstein & Ebenstein LLP is a distinguished full-service intellectual property law firm based in New York City. With a rich history spanning over six decades (founded in 1954), the firm has established itself as a leader in protecting and enforcing intellectual property rights. They offer comprehensive legal services in patents, trademarks, copyrights, trade secrets, unfair competition, internet law, and related litigation and licensing. The firm serves a diverse clientele, ranging from individual inventors and startups to multinational corporations, across various industries including technology, pharmaceuticals, fashion, and entertainment. They are known for their deep legal expertise, strategic approach to IP management, and commitment to achieving clients' business objectives.

Where Is Amster, Rothstein & Ebenstein's Headquarters?

HQ Function

The New York headquarters serves as the central hub for all the firm's operations, including legal practice management, client consultations, administrative support, and strategic decision-making. It houses the majority of their attorneys and staff.

Notable Features:

Located in a prominent Class A office building in Midtown Manhattan, offering modern facilities, advanced technology infrastructure, and convenient access for clients and legal professionals.

Work Culture:

The firm fosters a collaborative, intellectually rigorous, and client-centric work culture. Emphasis is placed on mentorship, professional development, and maintaining a high standard of legal excellence in a collegial environment.

HQ Significance:

The headquarters' location in New York City, a global center for commerce, finance, and innovation, positions the firm at the heart of major legal and business activities, facilitating direct engagement with a diverse client base and the legal community.

Values Reflected in HQ: The headquarters' prime location, professional environment, and sophisticated infrastructure reflect the firm's commitment to excellence, client service, prestige, and accessibility.

Location:

While physically headquartered in New York, Amster, Rothstein & Ebenstein LLP maintains a significant global reach by representing clients in intellectual property matters worldwide. They manage international patent and trademark portfolios, engage with foreign associates and counsel, and navigate the complexities of cross-border IP enforcement and litigation. Their expertise supports clients in protecting their innovations and brands in key markets across the globe.

Street Address:

90 Park Avenue, 21st Floor

City:

New York

State/Province:

NY

Country:

USA

Where Else Does Amster, Rothstein & Ebenstein Operate Around the World?

Not Applicable - Centralized Operations

Address: Based on publicly available information, Amster, Rothstein & Ebenstein LLP operates primarily from its New York City headquarters and does not list other official branch office locations. Their services are provided nationally and internationally from this central hub.

N/A - Operations are centralized. The firm's reach is not defined by multiple physical offices but by their expertise and ability to handle IP matters globally.

Buying Intent Signals for Amster, Rothstein & Ebenstein

Highperformr Signals uncover buying intent and give you clear insights to target the right accounts at the right time — helping your sales, marketing, and GTM teams close more deals, faster.

Notable news
Hiring actively
Corporate Finance
Corporate Finance
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Corporate Finance
Corporate Finance
*Example signal, not calculated in real time

Who's Leading Amster, Rothstein & Ebenstein? Meet the Executive Team

As of April 2025, Amster, Rothstein & Ebenstein' leadership includes:

Anthony F. Lo Cicero - Managing Partner
Charles R. Macedo - Partner
Brian J. Amos - Partner
Jessica L. Sblendorio - Partner
Marc J. Pensabene - Partner

Who's Investing in Amster, Rothstein & Ebenstein?

Amster, Rothstein & Ebenstein has been backed by several prominent investors over the years, including:

Amster, Rothstein & Ebenstein LLP is a privately held partnership and is not funded by external investors in the traditional sense (e.g., venture capital, private equity).

What Leadership Changes Has Amster, Rothstein & Ebenstein Seen Recently?

Hire2
Exits0

In the past 12 months, Amster, Rothstein & Ebenstein LLP announced promotions to Counsel. Specific top-level executive (e.g., Managing Partner) hires or exits are not frequently publicized unless significant changes occur. Law firms typically see movements at the Partner and Counsel levels.

New Appointments:

Mary L. Grieco, Mary L. Grieco appointed to Counsel. Her practice focuses on trademark, copyright, and unfair competition law.
Mark A. Berube, Mark A. Berube appointed to Counsel. He specializes in patent prosecution and litigation, particularly in the electrical and computer arts.

What Technology (Tech Stack) Is Used byAmster, Rothstein & Ebenstein?

Discover the tools Amster, Rothstein & Ebenstein uses. Highperformr reveals the technologies powering your target accounts — helping your sales, marketing, and GTM teams prioritize smarter and close faster.

Amster, Rothstein & Ebenstein Email Formats and Examples

Amster, Rothstein & Ebenstein LLP likely utilizes common professional email formats. The most probable format combines the first initial with the last name, or the full first name and last name separated by a dot, followed by '@arelaw.com'.

flast@arelaw.com (e.g., jdoe@arelaw.com) or first.last@arelaw.com (e.g., jane.doe@arelaw.com)

Format

alocicero@arelaw.com

Example

90%

Success rate

What's the Latest News About Amster, Rothstein & Ebenstein?

arelaw.com (Firm Website) • January 8, 2024

Amster, Rothstein & Ebenstein LLP Announces Counsel Promotions

Amster, Rothstein & Ebenstein LLP announced the promotion of Mary L. Grieco and Mark A. Berube to the position of Counsel, effective January 1, 2024. These promotions recognize their significant contributions to the firm and their expertise in intellectual property law....more

arelaw.com (Firm Website) / Best Lawyers • August 17, 2023

Amster, Rothstein & Ebenstein LLP Attorneys Recognized in The Best Lawyers in America® 2024

Multiple attorneys from Amster, Rothstein & Ebenstein LLP were recognized in the 2024 edition of The Best Lawyers in America®. This recognition is based on peer review and highlights the firm's continued excellence in various intellectual property law practice areas....more

arelaw.com (Firm Website) / Super Lawyers • October 26, 2023

New York Metro Super Lawyers Recognizes ARE LLP Attorneys

Several attorneys from Amster, Rothstein & Ebenstein LLP were named to the 2023 New York Metro Super Lawyers and Rising Stars lists. This distinction acknowledges attorneys who have attained a high degree of peer recognition and professional achievement....more

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