Sirje Kahu, Patent Attorney, Trademark and Design Attorney, Member of the Chamber of Estonian Patent Attorneys, member of Court of Honour of the Chamber, Council of the European Patent Institute (epi) and Disciplinary Board of epi.
Graduated from the  University of Tartu as a chemist 1980 and Moscow Patent Institute 1986. Worked for the University of Tartu at the Patent Department and Innovation Centre 1980-2002.
Estonian Patent Attorney since 1992, simultaneously with the restoring of the industrial property protection in Estonia. European Patent Attorney 2002, EU Trademark and Design Attorney 2004.
e-mail: skahu@ustervall.ee

Arno Anijalg, Patent Attorney, Trademark and Design Attorney, Member of the Chamber of Estonian Patent Attorneys. Graduated from the University of Tartu as a chemist 1973, and from Moscow Patent Institute  1976.
Worked for the Patent Department and Innovation Centre at the University of Tartu 1985-2002.
Estonian Patent Attorney since 1992, European Patent Attorney since 2002, EU Trademark and Design Attorney 2004.   
e-mail: anijalg@ustervall.ee

Kadri Aua, Trademark and Design Attorney, lawyer. Member of the Chamber of Estonian Patent Attorneys. Graduated from the University of Tartu in the field of law 1998. She has worked as the lecturer of intellectual property at the Faculty of Law at the  University of Tartu 1999-2008. She has acquired additional professional knowledge and skills also in Stockholm, Helsinki, Gröningen, Alicante, etc. She has conducted several intellectual property seminars and trainings, e.g. on intellectual property in R&D, copyright issues in studies and research.
Estonian Patent Attorney (trademarks and designs) and EU Trademark and Design Attorney 2018.
e-mail: kaua@ustervall.ee