Professionals & Technical Associates

In PATENTS, we specialise in the areas of Telecommunications, Electronics, Automobiles & Transmissions, Pharmaceuticals, Biotechnology, Heavy Machinery, Metallurgy and Materials Sciences, and Chemical Engineering.

We have 9 Patent Attorneys and 2 Advocates in our Patents department, with experience ranging from 5 to 30+ years, and 21 highly qualified and experienced Paralegals, Managers and Support Staff

We are currently actively prosecuting over 2000 patent applications, 220 Patent Oppositions, Revocations and Litigation matters. In the past one year we have attended more than 600 hearings through video conferencing.

We have obtained over 3000 Foreign Filing Licenses for Indian inventors, handled 220 Pre-grant and Post-grant Oppositions, 65 Patent Appeals, and IP Infringement litigation cases in the last 3 years.



In TRADEMARKS, we specialise in Searches, Opinion, Prosecution, Oppositions, Cancellations and Litigation.

We have a robust trademark opposition and litigation practice of over 50 years, and office presence within the jurisdictions of the major High Courts in India in Delhi, Bombay, Madras and Calcutta.

We have over 15 Trademark Attorneys and Advocates in our Trademarks and Litigation department, with experience ranging from 2 to 30+ years, and 12 highly qualified and experienced Paralegals, Managers and Support Staff.

We have handled/are handling 35,000+ trademark applications, 3000+ International Applications under the Madrid Protocol, 11,000+ trademark opposition matters, 2500+ trademark rectification matters before the Registrar of Trademarks, and 500+ enforcement matters, before the Registrar of Companies (trade names), the High Courts (trademark infringement and passing off), domain name complaints/ arbitration, and IPR proceedings before the Customs, in India.

We have excellent case preparation capabilities which has translated to a high success rate (99%). We have successfully handled over 350 trademark litigation matters for our international and domestic clients, in the last 25 years, including achieving several “well-known mark” decisions, namely for the brands ZARA, NIVEA, CALVIN KLEIN, HONDA, CANON, CITIZEN, among others, in India.

We also specialize in handling pre-litigation investigations, legal (cease and desist) notices and take-down notices of infringing content over the Internet.

Attorneys, Professionals and Managers

  • Sudhir D. Ahuja

    Registered Patent Agent [IN/PA-122].

    Experience: 42 years

    He handles Administration, Foreign Filings, Patent Oppositions, Designs, Licensing and Joint Ventures.

  • Dr. I. S. Bhattacharya, Ph.D.

    Registered Patent Agent [IN/PA-270]. M.Sc in Organic Chemistry from IIT Mumbai and Ph.D. from IIT, Mumbai.

    Experience: 38 years

    She handles Patent Prosecution, Oppositions and Appeals in the areas of Pharmaceuticals, Biotechnology and Gene Technology.

  • S. K. Gue

    Registered Patent Agent [IN/PA-892].

    Experience: 41 years

    Bachelor of Engineering (Hons), Metallurgy from, the National Institute of Technology, Durgapur.

    He handles Patent Prosecution, Oppositions and Appeals in the areas of Metallurgy, Automobiles, Heavy Vehicles and Software Electronics.

  • A. Singh

    Registered Patent Agent [IN/PA-2046].

    Experience: 18 years

    Master's Degree in Mathematics She handles Patent Drafting, Patent Searches and opinions.

  • Meenakshi Maharaj

    Registered Patent Agent [IN/PA-1064].

    Experience: 20 years

    Master's Degree in Radio Electronics & Telecommunications Engineering from the Odessa State University, Post Graduation in Business Law and Diploma in Business Management.

    She handles Patent Prosecution, Oppositions and Appeals in the areas of Telecommunications, Electronics, Computers, and Electrical Appliances.

  • Snigdha Rani Das

    Registered Patent Agent [IN/PA-667], Lawyer and Advocate, Bar Council Membership No. : D/2966/2009

    Experience: 21 years

    Bachelor's Degree in Engineering (Electronics) from the National Institute of Science & Technology, Lawyer & Advocate (L.L.B.) from the Integrated School of Law.

    She handles Patents and Designs Prosecution, Oppositions and Appeals in the areas of Software, Electronics including Telecommunications, Semiconductor, embedded system, and Electrical Appliances.

  • B. Das

    Registered Patent Agent [IN/PA-915].

    Experience: 49 years

    Bachelor's Degree in Metallurgical Engineering and handles Patent and Design Prosecution.

  • Rupsa Gupta

    Registered Patent Agent [IN/PA-1613].

    Experience: 15 years

    Bachelor's Degree in Biotechnology. She handles Patent Prosecution, Oppositions and Appeals in the areas of Pharmaceuticals, Biotechnology and Gene Technology.

  • Aditi Sen Tripathi

    Lawyer and Advocate, Bar Council Membership No. : Mah/3515/2001

    Experience: 20 years

    Bachelor’s Degree in Science and a Master’s Degree in Law. She handles Patent and Design Litigation and Appeals.

  • A. K. Jain

    Registered Patent Agent [IN/PA-5314].

    Experience: 11 years

    Master's Degree in Science (Microbiology) He assists in Patent prosecution.

  • B. Malakar

    Bachelor's Degree in Science.

    Experience: 27 years

    He handles Design matters.

  • D. Roy

    Diploma in Mechanical Engineering

    Experience: 15 years

    He handles Patent Operations.

  • A. Dam

    Bachelor's Degree in Science (Aircraft Maintenance Engineering) .

    Experience: 8 years

    He assists in Patent prosecution.

  • C. Ghosh

    Bachelor's Degree in Commerce and a Post Graduate Diploma in International Marketing.

    Experience: 20 years

    She heads the Patent Annuities Department and Foreign Filing Licence department..

  • S. Manna

    Bachelors Degree in Technology (Civil Engineering)

    Experience: 7 years

    She assists in Patent Prosecution.

  • A. Ahuja

    Bachelor's Degree in Science (Oceanography) from the University of Washington, USA and Master's Degree in Science (Innovation & Entrepreneurship) from the University of Manchester, UK

    Experience: 1 year

    She handles Patent Drafting and Patent Searches.

  • R. Sircar

    Master's Degree in English Literature & Language from the University of Calcutta, Post Graduate Diploma in Mass Communication, Registered Trademark Agent, Registered Geographical Indications Agent

    Experience: 34 years

    She handles case law research, legal analysis, Trademark Prosecution, Oppositions, Opinions, International Trademarks under the Madrid Protocol, Copyrights and Geographical Indications.

  • S. S. Mitra

    Bachelor's Degree in Geography from the University of Calcutta

    Experience: 38 years

    She heads the department of Trademark Investigations, Brand Enforcement, Litigation, Licensing, Customs Procedures and Domain Name issues.

  • R. Mitra

    Lawyer and Advocate.

    Experience: 24 years

    She handles Trademark Opposition and Rectification hearings, Appeal hearings and Litigation.

  • M. Kumar

    Lawyer and Advocate, Former Examiner of Trademarks

    Experience: 21 years

    He handles Trademark Oppositions, Rectifications and Appeals.

  • K. S. Rai

    Lawyer and Advocate, Former Examiner of Trademarks

    Experience: 22 years

    He handles Trademark Oppositions.

  • S. S. Menon

    Lawyer and Advocate.

    Experience: 14 years

    She handles case law research, legal analysis, Trademark Oppositions, Rectifications, Appeals and Litigation.

  • B. Banerjee

    Lawyer and Advocate.

    Experience: 12 years

    He handles Trademark Rectifications, Appeals and Litigation.

  • N. Thambi

    Lawyer and Advocate.

    Experience: 11 years

    She handles evidence preparation in Trademark Oppositions and Litigation.

  • S. Chatterjee

    Lawyer and Advocate.

    Experience: 9 years

    He handles Trademark Prosecution hearings, Oppositions, Opinions and Evidence Preparation

  • M. Biswas

    Lawyer and Advocate.

    Experience: 11 years

    She handles Trademark Oppositions and Evidence Preparation.

  • V. Singh

    Lawyer and Advocate.

    Experience: 6 years

    She manages Trademark Watches.

  • S. Sarkar

    Lawyer and Advocate.

    Experience: 8 years

    She handles Trademark Oppositions.

  • N. Nath

    Lawyer and Advocate.

    Experience: 4 years

    She handles Trademark litigation

  • S. Ghosh

    Lawyer and Advocate

    Experience: 4 years

    He handles Trademark Searches and Prosecution

  • B. M. Quinn

    Lawyer & Solicitor (University of Central England)

    Experience: 24 years

    He handles foreign Trademark matters and is qualified to practice in the UK.

  • S. D. Ahuja
    43 years of association with the firm
  • Dr. I. S. Bhattacharya
    29 years of association with the firm
  • S. K. Gue
    23 years of association with the firm
  • M. Maharaj
    22 years of association with the firm
  • A. Singh
    19 years of association with the firm
  • B. Das
    17 years of association with the firm
  • A. S. Tripathi
    16 years of association with the firm
  • R. Gupta
    15 years of association with the firm
  • S. R. Das
    13 years of association with the firm
  • A. K. Jain
    4 years of association with the firm
  • C. Ghosh
    24 years of association with the firm
  • B. Malakar
    18 years of association with the firm
  • D. Roy
    17 years of association with the firm
  • A. Dam
    8 years of association with the firm
  • N. Sanyal
    35 years of association with the firm
  • S. Das
    19 years of association with the firm
  • M. George
    19 years of association with the firm
  • S. Maitra
    18 years of association with the firm
  • S. Mishra
    19 years of association with the firm
  • A. Pal
    15 years of association with the firm
  • D. Dey
    16 years of association with the firm
  • S. Basu
    9 years of association with the firm
  • S. Ghosh
    8 years of association with the firm
  • S. Chakraborty
    7 years of association with the firm
  • S. Shee
    6 years of association with the firm
  • B. Ghosh
    6 years of association with the firm
  • R. Basu
    6 years of association with the firm
  • S. Manna
    6 years of association with the firm
  • A. Ahuja
    1 year of association with the firm
  • R. Sircar
    31 years of association with the firm
  • S. S. Mitra
    29 years of association with the firm
  • M. Kumar
    19 years of association with the firm
  • S. S. Menon
    19 years of association with the firm
  • B. M. Quinn
    14 years of association with the firm
  • R. Mitra
    14 years of association with the firm
  • N. Thambi
    13 years of association with the firm
  • B. Banerjee
    13 years of association with the firm
  • M. Biswas
    8 years of association with the firm
  • S. Chatterjee
    8 years of association with the firm
  • V. Singh
    7 years of association with the firm
  • S. Ghosh
    12 years of association with the firm
  • N. Nath
    3 years of association with the firm
  • S. Sarkar
    2 years of association with the firm
  • K. S. Rai
    1 year of association with the firm
  • M. N. Akhter
    16 years of association with the firm
  • A. K. Sadhukhan
    18 years of association with the firm
  • D. Goswami
    12 years of association with the firm
  • B. Bhandari
    12 years of association with the firm
  • B. Das
    10 years of association with the firm
  • A. Majumdar
    9 years of association with the firm
  • M. Dhar
    9 years of association with the firm
  • A. Biswas
    8 years of association with the firm
  • A. Banerjee
    30 years of association with the firm
  • I. Palit
    16 years of association with the firm
  • R. Neogi
    25 years of association with the firm
  • M. Majumdar
    18 years of association with the firm
  • S.K. Khaitan
    38 years of association with the firm (Auditor)
  • I. Mitra
    14 years of association with the firm
  • P. Banerjee
    16 years of association with the firm
  • B. Bisht
    24 years of association with the firm
  • M. V. K. Prasad
    10 years of association with the firm
  • A. Nag
    16 years of association with the firm
  • R. Saha
    14 years of association with the firm
  • T. Jana
    13 years of association with the firm
  • A. Saha
    13 years of association with the firm
  • S. Biswas
    12 years of association with the firm