About us


IdeaNav helps inventors protect their ideas.

Who we are

IdeaNav was formed in 2007 and includes:

Patent Attorneys / Directors:
Anthony van Zantwijk (BSc(Civ)Eng, LLB, LLM(Tax)),

McLean Sibanda (MSc(Met)Eng, LLB, LLM-Commercial, PhD)

Paulo Lopes (MSc(Mech)Eng, LLB, HDip(Tax))

Trademark Attorney:
Taya Lombard (LLB)

Assistant: Lesley Mackell.

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

Why S&Z?

  • In 2019 and 2020, S&Z was the #2 filer of South African provisional patents. And, in September 2021, S&Z became the #1 filer of South African patents.
  • S&Z patent attorneys used to work at one of South Africa’s biggest patent firms, Spoor and Fisher.
  • S&Z offer a complete range of intellectual property commercialisation services to clients including Anglo American, De Beers, Sasol, SARS and the SA Reserve Bank.


We offer affordable patent and design services. To reduce cost, we also offer online patent, design and trademark filings.

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.


We embrace online systems that reduce the cost to file and prosecute patents, trademarks and designs to grant. In this regard, we work closely with GlobalIPCo – a software company that develops: IP management systems (that we use to file and report on applications); and online filing systems (for which we are the exclusive South African agent).

Provisional Patent Online

Our online patent, trademark and design renewal system is also popular among multinational companies to reduce their cost of holding patents.

Latest Specials
  • Save up to 70% on renewal fees

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

    Renew Patent
  • Prototype

    3D CAD drawings, renderings, poster, plastic prototype

    Find Out More
  • Register a Trademark in South Africa

    R3,750 + vat

    Find Out More
  • Patent Pending Number

    Only $199

    See More
  • Online SA design filing

    Only $299

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  • Online SA trademark filing

    Only $199

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  • Patent search

    R9,950 + vat

    Find Out More
  • Trademark search

    R2,500 + vat

    Learn More
  • Register provisional patent

    R19,950 + vat

    Find Out More

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