Dieter Welthagen

Patent Attorney

A South African patent attorney assisting our overseas clients in obtaining protection for patents, designs, and utility models throughout Africa.

About Dieter Welthagen

Dieter has extensive experience in patent drafting, patent filing and prosecution, registered designs and utility model applications. He provides these services in African countries and abroad, for both local and overseas clients.

Dieter has travelled to various patent offices within the African continent to attend to specific client matters and to gain insight into their operations.

He currently assists overseas clients, including multinational companies, in filing and prosecuting patent, design and utility model applications in all African countries and the regions covered by ARIPO and OAPI.

Focus areas

  • Patent filing and prosecution
  • Design filing and prosecution
  • Utility model filing and prosecution


  • University of Pretoria, BEng (Civil) (1990)
  • University of Pretoria, LLB (2001)
  • Qualified Patent Attorney (2003)

Affiliations and accolades

  • Attorney of the High Court, South Africa
  • Patent Attorney, South Africa

Featured in

Von Seidels Awarded

“Patent Firm of the Year – South Africa” recognition during Managing Intellectual Property’s awards ceremony held last night in London.

World IP Day 2022

World IP Day today focuses on young people and innovation. At Von Seidels we celebrate young inventors, brand owners, IP professionals and…