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Petty Patents

A petty patent protects a practical improvement. Registration is much faster than a patent; the term is much shorter.

Many inventions improve on something existing rather than create something wholly new. Those often fail the inventive step a patent requires, but can still be registered as a petty patent, for which the law does not impose that condition.

The trade-off is a considerably shorter term, in exchange for much faster registration, since there is no detailed examination of inventive step at the first stage. For products with a short life, getting the right quickly is worth more than holding it for long.

Novelty still applies exactly as it does for a patent: public disclosure before filing destroys it.

When a petty patent is the right choice

  • The invention improves on something existing and a skilled person might arrive at it without great difficulty.
  • The product has a short life and the right is needed quickly.
  • A registered right is needed for negotiations with partners or investors.
  • The aim is to control copies in the domestic market.

When to file a patent instead

  • The invention is not obvious to a skilled person and has long-term value.
  • You will also file abroad, where many countries have no petty patent system.
  • It will be used as an asset in fundraising or a sale of the business, where investors look at the remaining term.

What we do

  • Assess which of the two routes fits the invention.
  • Search the prior art to assess novelty.
  • Draft the specification and the claims.
  • File and see the application through to registration.
  • Keep the annual fees and renewals in order.
  • Act against infringers, and record assignments and licences.

This page is general information, not advice on your invention. The choice between the two is made case by case; bring the details for assessment before disclosing anything publicly.

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Tell us what you are dealing with. We will say plainly whether it is something we handle, what it involves, and what it costs.

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