Do I Need One Patent or Several Patent Applications?

Do I need one patent or several patent applications?

Many inventors begin with a simple assumption: one product means one patent. In practice, that is often not the best way to think about the patent system.

The patent system is designed around inventions, not around products as such. The UK IPO’s own patent data guidance states that a patent may protect only a single inventive concept, and where further inventive concepts exist they may be divided out into new applications, often called divisional applications, while keeping the filing date of the original parent application.

That means the real question is usually not whether one product deserves one patent, but whether one product contains one invention or several.

In many cases, an innovative product will encompass several potential inventions, often with overlapping scope. A core mechanism may be inventive. A control feature may be inventive. A manufacturing arrangement may be inventive. A material adaptation may be inventive. A method of using the product may be inventive. An accessory or interface may be inventive. These may all relate to the same product, but they are not necessarily the same invention.

That is why the idea of a single patent for a single product is often the wrong match. The better way to think about it is a single patent application for a single inventive concept, which may or may not be the only inventive concept relevant to the product.

At Patent Outsourcing Limited, part of the value of patent preparation and drafting is identifying whether a client really has one invention or several related inventions that may justify separate protection.

One invention may also reach across several products

The position can also work in the other direction.

Sometimes one invention is not confined to one product at all. A single inventive concept may be capable of use across several different products, or in several different areas of technology or commerce. That can itself be a good reason for preparing more than one patent application, especially where the applications can be framed to emphasise different commercial sectors, different embodiments or different routes to exploitation.

This can be strategically very important.

If an invention can be applied in more than one area of technology, separate applications may greatly improve the potential for licensing to third parties. An inventor may understand one sector well and be able to develop it personally, but be far more dependent on third parties to exploit other sectors. In that situation, there may be real value in separate applications directed to the sectors where third-party expertise is required. Those applications may then be licensed, assigned or otherwise used as commercial assets in their own right.

That is one of the reasons why the answer to “do I need one patent or several?” is often commercial as well as legal.

A product may contain overlapping inventions

Another reason several applications may be sensible is that inventive concepts often overlap without being identical.

A product may contain a broad inventive idea and one or more narrower, more specific inventions within it. Alternatively, the inventor may have recognised a problem in the market that has not previously been well understood, and from that recognition several technically different solutions may follow.

This is important because patents protect technical solutions rather than problems in the abstract. A patent is not granted merely for recognising that a problem exists in the marketplace. What is protected is the technical solution or solutions to that problem. If several technically distinct solutions arise from identifying that problem, then several patent applications may be justified.

That can be particularly useful where the inventor suspects that one solution may prove commercially optimal, but other solutions still have technical and licensing value. Filing more than one application may help preserve flexibility and reduce the risk that all value depends on a single technical route.

Why one application may not be a strong enough foundation on its own

There is also a pragmatic point.

Inventors sometimes assume that once a patent application has been filed, the legal position is secure. It is not that simple. Filing a patent application is often a very important step, but it is not the same as obtaining a granted patent, and not every application proceeds to grant.

The UK IPO’s 2024 facts and figures show 18,953 patent applications and 8,228 grants in 2024. However, the same publication expressly warns that it is not possible to use applications filed in a given year and grants issued in that same year to calculate the proportion of “successful” applications, because grants in a calendar year often relate to applications filed in previous years.

That means it would be misleading to state simply that “one in three” UK patent applications are granted by comparing same-year filings and grants. The official statistics do not support that kind of direct success-rate calculation. What they do show is something more general and still important: filing a patent application is not itself a guarantee of grant, and the process is more uncertain than many first-time inventors expect.

That is one reason why relying entirely on a single application can be commercially fragile, especially if the business venture is intended to stand or fall on patent protection.

Several applications can create a broader and more flexible position

A broader filing strategy can therefore have several advantages.

First, it can reduce concentration risk. If a business has only one patent application and that application encounters difficulty, the commercial position may be badly weakened. If there are several related applications covering different concepts, fallback positions or different commercial sectors, the overall position may be more resilient.

Secondly, it can improve licensing flexibility. An application directed to one industrial sector may be highly valuable to one type of licensee, while a different application covering the same underlying concept in another sector may be more suitable for another market participant.

Thirdly, it can help separate the commercially central invention from secondary but still valuable technical developments. Sometimes the secondary developments are exactly the features a third party will wish to exploit.

Fourthly, it can help preserve optionality where the invention is still developing. A first application may capture the broad concept, while later applications can capture refinements, alternatives or sector-specific implementations.

This does not mean “file as many as possible”

None of this means that inventors should file multiple patent applications automatically or indiscriminately.

There must still be a proper legal and commercial basis for doing so. Each application should relate to a real inventive concept and should be justified by technical content and commercial strategy. Filing more applications than the invention truly supports is not a substitute for identifying the right inventions in the first place.

The better lesson is that inventors should not assume that one product automatically means one application. Sometimes one application is appropriate. Often, however, a more careful review shows that the invention landscape is richer and that several filings may better reflect the real opportunity.

That is precisely where early patent attorney input can be valuable. A patent attorney can help identify whether there is one inventive concept, several overlapping concepts, a broad concept with narrower fallbacks, or a family of related inventions suitable for different sectors. That analysis can be important both for legal protection and for the later commercial structure of licensing or sale.

At Patent Outsourcing Limited, this is often part of the early strategic discussion with inventors. The issue is not only how to draft an application, but how to identify the set of technical concepts that actually deserve protection.

Divisional applications and later follow-on filings

The UK IPO’s patent data guidance is also helpful in reminding inventors that multiple applications do not always have to arise at the outset as completely separate filings.

Where further inventive concepts are identified within an original filing, those may in some cases be divided out into divisional applications that keep the original filing date of the parent application. That reflects the principle that a patent is directed to a single inventive concept, not an unlimited bundle of unrelated inventions.

In other cases, later follow-on filings may be appropriate for later-developed improvements, sector-specific embodiments or alternative solutions that were not yet ready at the time of the first filing.

So when inventors ask whether they need one patent or several, the answer may involve a combination of original filings, divisional practice and later improvement filings depending on how the invention develops.

Conclusion

So, do you need one patent or several patent applications?

Often, the answer is not determined by the number of products, but by the number of real inventive concepts and the number of commercially relevant ways those concepts may be exploited. A single product may contain several inventions. A single invention may apply across several products or sectors. Multiple applications can therefore be valuable not only for legal protection, but also for licensing, sector-specific exploitation and broader commercial resilience. The UK IPO’s own guidance recognises that a patent may protect only a single inventive concept and that further concepts may be divided out into new applications.

The UK IPO’s latest annual figures also show that patent filing and patent grant are not the same thing, and the IPO expressly warns that same-year filing and grant counts cannot be used to calculate a true success rate. That is a useful reminder that simply filing one application is no guarantee of obtaining granted rights.

At Patent Outsourcing Limited, we help inventors identify whether their innovation is best protected by one carefully focused application or by a broader family of related applications that better reflects the real technical and commercial opportunity.

Does one product usually mean one patent application?
Not necessarily. The patent system is directed to inventions or inventive concepts, not simply to products. One product may contain several distinct inventions, and one invention may apply across several products or sectors.

Can one patent application cover several inventions?
The UK IPO’s patent data guidance states that a patent may protect only a single inventive concept. Further inventive concepts may be divided out into new applications, including divisional applications that can keep the filing date of the parent.

Why might several patent applications be useful?
Several applications may help where a product contains multiple overlapping inventions, where one invention has value in several sectors, or where different applications may later be licensed or sold separately to third parties.

Can separate applications help with licensing?
Yes. If an invention has relevance in different sectors, separate applications can sometimes make it easier to license or assign rights in the sectors where third-party expertise or market access is needed.

Is it true that only about one in three UK patent applications are granted?
The UK IPO’s 2024 figures show 18,953 applications and 8,228 grants in that calendar year, but the IPO expressly states that you cannot use same-year application and grant counts to calculate the proportion of “successful” applications, because grants in one year often relate to applications filed in earlier years. It is therefore safer to say that filing is not a guarantee of grant, rather than claiming a simple one-in-three success rate.

Can Patent Outsourcing Limited help decide whether one or several applications are needed?
Yes. Patent Outsourcing Limited provides intellectual property legal services including patent preparation, drafting and filing support, and can help identify whether an innovation is best protected through one application or a broader filing strategy.

Important notice: This article is provided for general information only and is not legal advice. It is a brief overview of a complex area and does not take account of your particular circumstances, commercial objectives or the specific facts of any matter. Intellectual property rights, filing strategy and legal outcomes will depend on the detail of the case and the applicable jurisdiction. You should not rely on this article as a substitute for taking advice from a suitably qualified legal professional. If you require advice on a specific matter, you should seek advice directly from a patent attorney, solicitor or other appropriate legal practitioner.