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Quick facts
Listed

Listed since 2025 in the European Innovation Council (EIC) Ecosystem Partnership Programme catalogue

Network Memberships

INTA, FICPI, EPI, AIPPI

Key practice areas
Intellectual property
Trade mark
Patent
Firm overview

Cabinet M. Oproiu is a highly respected IP boutique known for its expertise in patent and trademark prosecution and enforcement. The firm is actively involved in proceedings with national patent office, European Patent Office and the European Intellectual Property Office.

Patents

The firm is actively involved in drafting, filing and prosecuting European Patents, benefiting from the rise of local demand for such services and from the recently-acquired listing in the European Innovation Council (EIC) Ecosystem Partnership Programme catalogue.

Case studies show that the firm was actively involved in a series of litigations on behalf of a large pharmaceutical company whose supplementary protection certificate was under attack in Romania as well as in other EU countries.
 
Trademarks

The firm is actively involved in prosecuting national and European trademarks, including all contentious matters: oppositions, appeals, nullifications, both in Romania and at the European Intellectual Property Office of Alicante.

Notable practitioners
  • Margareta Oproiu
  • Raluca Vasilescu
  • Andreea Stanescu
  • Ioana Sturza
  • Silvia Ene
  • Mariana Popescu
Practice Areas & Sector Specialisations

Sector Expertise for Patent Matters:

  • Electronics
  • Computers
  • Internet
  • Artificial Intelligence
  • Automotive
  • Chemical Engineering
  • Mechanical Engineering
  • Medical Devices
  • Pharmaceuticals
  • Biotechnology
  • Life Sciences

 

Address:
Popa Savu 42, Ground Floor
Bucharest 011434
Tel:+40 21 260 28 33 Email:Contact Us Web Address:http://www.oproiu.ro
2026 Edition
Patent
Tier 1
12 firms ranked
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Tier 1

Cabinet M Oproiu
3 practice areas
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Dincă & Speciac
4 practice areas
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Zamfirescu Racoți Vasile & Partners
5 practice areas
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Tier 2

Baciu Partners
12 practice areas
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Muşat & Asociaţii
7 practice areas
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Tier 3

CWB
5 practice areas
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Nestor Nestor Diculescu Kingston Petersen (NNDKP)
7 practice areas
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Trade mark prosecution
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18 firms ranked
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Tier 1

Baciu Partners
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Cabinet M Oproiu
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Tier 2

CWB
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Cosmovici & Associates
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Milcev Burbea
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Tier 3

Drakopoulos
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Nestor Nestor Diculescu Kingston Petersen (NNDKP)
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Zivko Mijatovic & Partners (ZMP)
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Lexters
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Ratza & ratza
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WH Simion & Partners
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Overview

Cabinet M Oproiu is a highly respected IP boutique known for its expertise in trade mark and patent protection. The firm is actively involved in IP office work and court proceedings.

Notable practitioners: Margareta Oproiu and Raluca Vasilescu.

The partners are supported by a team of trade mark and patent attorneys. Nicoleta Groza and Ioana Sturza are practitioners to watch.

Testimonials

2026

"We have worked with Cabinet M Oproiu on IP filing, prosecution, and administrative matters, and their handling of inquiries has been efficient and straightforward."

"We have found Cabinet M Oproiu’s advisory guidance clear and practical for decision-making in IP matters."

"Best IP team in Romania in what regards prosecution and filing, technical input and understanding how to draft patents makes the difference."

"Quick responses, to the point, commercially minded. Excellent IP services!"

"Professional approach, clear communication throughout the patent application process, and thorough attention to detail in preparing our blockchain-based debt compensation system patent. The team demonstrated strong technical understanding and made the complex process straightforward."

"Professional management of the entire filing and prosecution process from initial application to follow-up. They handled complex technical documentation efficiently, kept us informed at every step, and demonstrated strong attention to procedural details and deadlines."

"Best team on the market, very attentive to details and responsive."

"Andreea Stanescu is an excellent IP professional. We love the great negotiation skills in infringement cases, comprehensive advice to clients, short turnaround times."

"Solid advisory support on IP strategy - they helped us understand the best approach for protecting our blockchain-based system, explained the nuances of patent scope and claims, and provided practical recommendations aligned with our business objectives. Their expertise in fintech patents was particularly valuable."

Margareta Oproiu

"Margareta handles matters efficiently and communicates clearly. Guidance is practical and reliable, making cooperation straightforward."

Raluca Vasilescu

"Strong technical understanding and ability to translate our complex fintech innovation into proper patent language. Raluca demonstrated good grasp of both the legal and technical aspects of our application."

 

2025

"Accurate and timely service. Highly experienced in IP proceedings."

"Cabinet M Oproiu provide to-the-point advice."

"They are experienced and dependable."

"They are professional, responsive and cost effective."

Linked Reviews
Patent

Case studies show the firm's team acted as technical experts in court proceedings and is experienced in filing patents. The firm dealt with patent work for .lumen, a startup best known for its AI-powered glasses for the blind. The startup secured funding in 2025.

In another matter, the firm convinced the EPO examiner, without the need for oral proceedings, to allow AKA Automotive’s patent application to proceed to grant. The firm was accepted as a European Innovation Council (EIC) partner in 2025.

Trade mark

Case studies show national court proceedings concerning trade mark registration and enforcement. The team also dealt with trade mark office matters including oppositions and cancellations. The firm receives work from law firms in European countries such as Germany and Spain.

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Raluca Vasilescu joins our ‘Five minutes with’ series to discuss patent mining and watercolour painting
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