About us

law firm patent firm


IdeaNav helps inventors protect their ideas and convert them into working prototypes.

Who we are

IdeaNav was formed in 2007 and includes:

Patent Attorneys:
Anthony van Zantwijk (BSc(Civ)Eng, LLB, LLM(Tax)),
Paulo Lopes (MSc(Mech)Eng, LLB, HDip(Tax))

Trademark Attorney:
Taya Lombard (LLB)

Industrial Designer:
Monica Monsanto

Assistant: Lesley Mackell.

The company was spun out of Sibanda & Zantwijk Patent Attorneys (a firm specialising in intellectual property commercialisation).

Why us?

  • Our patent attorneys used to work at one of South Africa’s biggest patent firms, Spoor and Fisher.
  • We have successfully prototyped many inventions, which are now in the market.
  • We offer a complete range of intellectual property commercialisation services to clients including Anglo American, De Beers, Sasol, SARS and the SA Reserve Bank.

We will take your idea further than any other South African patent firm.


We offer the most affordable patent and design services without compromising quality.

We have discarded the industry-standard hourly-rate billing model and substituted it with a fixed, transparent pricing policy that inventors can budget on.

Independence and objectivity

To protect our independence and objectivity, IdeaNav refuses to accept or offer referral payments. All referrals are motivated by value to the inventor instead of relationships or reciprocity.

law firm patent firm

law firm patent firm

law firm patent firm

Latest Specials
  • Prototype

    3D CAD drawings, renderings, poster, plastic prototype

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  • Register a Trademark in South Africa

    R3,450 + vat

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  • Save up to 70% on renewal fees

    Save up to 70% on patent renewal fees / annuities by paying them online

    Renew Patent
  • Online SA trademark filing

    Only $199

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  • Register provisional patent

    R9,950 + vat

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  • Online SA design filing

    Only $299

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  • Patent search

    R4,950 plus vat

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  • Patent Pending Number

    Only $199

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Get started with the patent process

Get in touch

Contact us

Intangible Consulting (Pty) Ltd.
9 Kruger St
South Africa

T +27 (0)11 483 1439
T +27 (0)11 483 3128 (alt.)
C +27 (0)83 233 4582
F +27 (0)86 627 0055