Welcome to Erna L. Kusoy & Co.

A boutique intellectual property (IP) law firm offering advice and consultation on the full range of IP services in Indonesia.

Led by founder and partner, Erna L. Kusoy, a leading registered IP Consultant and IP practitioner and former partner and head of the IP Department at Hadiputranto, Hadinoto & Partners (HHP) in Jakarta, this firm offers pragmatic advice on all legal and business issues relating to registering, maintaining and protecting intellectual property rights in Indonesia.

About Us

Erna L. Kusoy & Co., established in 2010, is widely recognized as one of the key intellectual property law firms in Indonesia. With practical experience of more than two decades, we bring a rich understanding of Indonesia’s unique business and legal culture to help our clients in all aspect of intellectual property matters.



Erna L. Kusoy obtained her Law degree at the University of Indonesia (guided course).

She holds an advocate license and a patent consultant license.

She is also a registered IP Consultant, appointed in 2006 by the Indonesian Ministry of Law and Human Rights.



APAA (Asian Patent Attorneys Association) Indonesia Group

  • Vice President of APAA of Indonesia (2009)
  • Trademark Committee member 2009
  • Ex-President (1997-2000)

AIPPI (International Association for the Protection of Intellectual Property Right) Indonesia Group

  • Ex-President (2003-April 2009)
  • Trademark Committee member 2009

AIPA (ASEAN Intellectual Property Association)

  • Ex-Council member

INTA, including: IAR Task Force for the TM Editorial Board, and Asia Pacific Subcommittee of the International Amicus

  • Committee
  • Ex-Member

AKHKI (Indonesian Intellectual Property Attorney Association)

  • Member of the Supervisory Commission (2013-2016)

IIPS (Indonesian Intellectual Property Society)

  • Founder member

Our Services

Below is a summary of the types of IP matter on which we advise:


Trademark Clearance Searches;

Trademark Filings (Registration and Renewals);

Appeals, oppositions and rebuttals;

Trademark Management Portfolio;

Trademark Enforcement Strategy.


Filing of Copyright Recordation;

Copyright Protection and Enforcement Advisory.


Patent General Advisory;

Patent Filings;

Counseling on the patentability of inventions;

Patent Searches;

Patent Enforcement Strategy.


Arranging Market Survey and/or Investigation;

Gathering Evidence and Samples of Counterfeit Products;

Cease and Desist Campaign;

Filing Criminal Action Complaint.


Both Civil and Criminal Proceedings in various IP disputes.


Reviewing and drafting various IP Licenses and Assignment of Rights Agreement;


IP Due Diligence;

Domain Name Protection.



Erna L. Kusoy

Erna L. Kusoy is the founding partner of Erna L. Kusoy & Co. She has more than 20 years’ experience advising domestic and international clients and handling Intellectual Property matters in the complex Indonesian market.

She started her professional career at the IP law firms Biro Oktroi Roosseno and Amroos & Partners before joining HHP in 1989. From then until mid-2008 she was responsible for developing and managing what became an exceptionally successful IP practice.

Over the years as an IP expert, Ms Kusoy, has collected a long list of IP awards and accolades, among others, individual recognition as an IP Leading Lawyer for the years 2002 to 2008, from IP ASIA. These accolades reflect recognition of her work from clients and peers alike, as well as her very substantial experience and achievements in the IP area.


Talavera Office Park, 28th floor Jl. TB. Simatupang Kav. 22-26
Jakarta Selatan 12430, Indonesia

phone / Fax:

+62-21-7599-9906 / +62-21-7599-9888