Разлика между патент и полезен модел

If you have developed a new technical solution and wish to protect it, you have probably already encountered the question: patent or utility model? Both instruments serve to protect technical innovations, but they differ significantly in terms of the requirements, the procedure, and the degree of certainty offered by the resulting protection. In this article, we will look at the main differences so that you can make an informed choice.

Under Bulgarian law, both regimes are governed by the Patents and Utility Model Registration Actwhich sets out the conditions for acquiring rights, as well as their content and protection. At the European level, patent protection is harmonized through through the European Patent Convention (EPC) and the European patent system, whereas utility models remain primarily a matter of national law.

Patent for an Invention

A patent is an exclusive right over an invention - a technical solution to a specific technical problem. In order to be patentable, the invention must meet three mandatory criteria:

novelty
inventive step
industrial applicability

These criteria are examined through a full substantive examination before the Patent Office. The procedure is longer and more demanding, but in return you obtain stronger protection that is more difficult to challenge.

Upon successful registration, the term of protection is 20 years, provided that the annual maintenance fees are paid. For medicinal products, additional protection is also available through supplementary protection certificates, which may extend protection beyond the expiry of the 20-year term.

A patent may protect three main types of subject matter:

a product (device, substance, composition)
a process (method or technology)
the use of a product or process in a new way

Utility Model

A utility model - also known as a "minor invention" or "petty patent" - is an alternative mechanism for protecting technical solutions with a lower degree of inventiveness. It is designed precisely for situations in which the innovation is genuine and practically valuable, but does not reach the level required for full patent protection.

Registration is carried out without a full substantive examination, which makes the procedure faster and more accessible. It is important to note, however, that the responsibility for verifying novelty and inventive step lies with the applicant. If the prior search is incomplete or inaccurate, a registered utility model may be challenged and cancelled much more easily than a patent.

The term of protection is 10 years, again provided that the annual fees are paid regularly.

A utility model is generally suitable for:

devices
constructions
mechanical solutions

Methods, chemical compounds, and biotechnological inventions generally cannot be protected through a utility model - for those, a patent is required, provided that the conditions for patentability are met.

Which Option Is Appropriate for Your Case?

The choice between the two forms of protection depends on the specific circumstances. Below are the situations in which each of them is more appropriate:

A utility model is a good choice when:

the innovation has a short life cycle and you need rapid protection
the invention does not reach the level of inventive step required for a patent
you are looking for lower initial costs

A patent is preferable when:

the technology has significant economic value
you need long-term and robust protection
you plan to exploit the invention internationally

In Brief

A patent and a utility model are two different but complementary tools for protecting technical innovations. A patent provides stronger and longer-term protection, but it requires a more rigorous procedure. A utility model is more flexible and more accessible, but it comes with a lower level of legal certainty.

The right choice depends on the type of innovation, the business objectives, and the intended duration of protection. This is exactly where specialized legal advice becomes essential.

KGK has extensive experience in national and European registrations of patents and utility models, as well as in the related administrative and court proceedings. If you have any questions or need assistance in the field of patent or utility model protection, do not hesitate to contact us.