What Can Be Patented? A Complete 2026 Guide to Patent Eligibility

Three Types of Patents: Choosing the Right Protection

Most major patent systems recognize multiple categories of patent protection, each covering different types of innovation. While terminology varies by jurisdiction, the fundamental concepts are consistent worldwide.

Utility Patents (Invention Patents): The Gold Standard of IP Protection

A utility patent protects any new and useful process, machine, article of manufacture, or composition of matter, or any new and useful improvement thereof.

• Protection term: 20 years from the filing date (standard across USPTO, EPO, CNIPA, JPO, and KIPO)
• Examination: Full substantive examination for novelty, inventive step, and industrial applicability
• Grant timeline: 2-3 years at the USPTO (average 23.3 months in 2024); 24-36 months at the EPO
• Scope: Covers products, processes, methods, compositions, and uses

Utility patents are the most powerful and comprehensive form of patent protection. They protect not just a specific product, but the underlying inventive concept -- meaning competitors cannot simply make cosmetic changes to avoid infringement. However, the examination is rigorous, and grant is not guaranteed.

The USPTO grants hundreds of thousands of utility patents each year, but grant is never guaranteed -- each application undergoes rigorous substantive examination for novelty, inventive step, and industrial applicability.

Utility Model Patents: Fast, Affordable Protection

A utility model protects new technical solutions relating to the shape or structure of a product.

• Protection term: Typically 10 years (varies by jurisdiction; not available in the United States or United Kingdom)
• Examination: Usually only formal examination (no substantive review of inventive step in most countries)
• Grant timeline: 6-12 months in most jurisdictions
• Scope: Generally limited to products with definite shape or structure (not methods or processes)

Utility models -- sometimes called "petty patents" or "innovation patents" -- are available in over 80 countries, including Germany, Japan, South Korea, China, and Brazil. They offer faster, cheaper protection with a lower inventive step requirement, making them ideal for incremental product improvements.

The German Patent and Trade Mark Office (DPMA) reports that utility model registrations provide especially strong value for SMEs, as they can be obtained in weeks rather than years and at a fraction of the cost of a full invention patent.

Design Patents: Protecting the Way Products Look

A design patent protects the ornamental appearance of a functional article -- its shape, surface ornamentation, or both.

• Protection term: 15 years from grant in the US; up to 25 years in the EU (5-year renewable terms); 15 years in China
• Examination: Primarily formal examination (the USPTO conducts limited substantive review for novelty)
• Grant timeline: 12-18 months at the USPTO; 4-8 months in China
• Scope: Visual appearance only -- not function or technical features

Design patents are critically important in consumer-facing industries: electronics, automotive, furniture, fashion, and packaging. Apple has famously used design patents to protect the distinctive look of iPhones, iPads, and MacBooks, winning landmark litigation against Samsung that resulted in hundreds of millions in damages.

According to WIPO's 2024 statistics, over 1.5 million industrial design applications were filed globally, with China, the EU, and South Korea leading in volume.

The Three Pillars of Patentability

Regardless of patent type, every invention must satisfy three fundamental requirements to be patentable.

Novelty: It Must Be New

Novelty means that the invention has not been disclosed to the public before the filing date (or priority date). "Disclosure" includes:

• Publication in any document anywhere in the world (including patents, journals, websites, or social media posts)
• Public use, demonstration, or sale anywhere in the world
• Oral disclosure at a conference, meeting, or presentation
• A prior patent application by anyone covering the same invention

Critical warning for inventors: One of the most common ways inventors destroy their own novelty is by publishing an academic paper, presenting at a conference, or posting on social media before filing a patent application. In the United States, there is a 12-month grace period for the inventor's own disclosures. In Europe, Japan, and most other jurisdictions, there is essentially no grace period -- any public disclosure before filing is fatal to novelty.

The golden rule: file first, publish second. Always.

Inventive Step (Non-Obviousness): It Must Not Be Obvious

Inventive step -- called "non-obviousness" in U.S. patent law -- requires that the invention would not be obvious to a person having ordinary skill in the relevant field, given the existing body of prior art.

This does not mean the invention must be a revolutionary breakthrough. It means that a hypothetical skilled technician, aware of all existing public knowledge, would not have arrived at the same solution through routine engineering. If your improvement solves a known problem in a new way, combines known elements to produce a surprising result, or addresses a technical challenge that others had failed to solve, it likely meets the inventive step threshold.

The EPO's Boards of Appeal have established the "problem-solution approach" as the standard framework for assessing inventive step in Europe, while the USPTO applies the framework from the Supreme Court's KSR v. Teleflex decision (2007).

Industrial Applicability (Utility): It Must Work

Industrial applicability -- called "utility" in U.S. patent law -- requires that the invention can be made or used in some kind of industry and produces a positive, tangible result. This requirement eliminates:

• Perpetual motion machines and other violations of natural laws
• Purely theoretical concepts with no practical application
• Inventions that cannot be reproduced consistently

This is the easiest requirement to satisfy. Nearly any invention that solves a real-world problem and can be manufactured or implemented will meet the industrial applicability threshold.

From Idea to Patent: You Do Not Need a Prototype

One of the most persistent misconceptions is that you need a working prototype to file a patent. This is false in every major jurisdiction.

Patent law protects technical solutions, not physical objects. As long as you can describe your invention in sufficient detail that a skilled person in the field could reproduce it, you can file a patent application. The description must be clear and complete -- but a prototype is not required.

The Three Steps from Concept to Filing

1. Define the technical problem: What specific, concrete problem does your invention solve?
2. Design the technical solution: What specific means -- structures, steps, materials, parameters -- do you use to solve it?
3. Verify feasibility: Is the solution physically possible and consistent with natural laws?

If you can clearly articulate all three, you are ready to file.

Famous People, Simple Patents

Patent history demonstrates that inventions need not be complex or "high-tech" to earn protection. Some notable examples:

• Abraham Lincoln (U.S. Patent No. 6,469, 1849): A device for lifting boats over shoals using inflatable bellows. Lincoln remains the only U.S. president to hold a patent, and his invention was remarkably simple -- a set of buoyant chambers attached to a boat's hull
• Mark Twain (U.S. Patent No. 121,992, 1871): An "Improvement in Adjustable and Detachable Straps for Garments" -- essentially an elastic waistband. Twain held three patents in total, including one for a self-pasting scrapbook that earned him substantial royalties
• Michael Jackson (U.S. Patent No. 5,255,452, 1993): A special shoe with a heel slot that engages a stage surface, allowing the wearer to lean forward at extreme angles -- creating his signature 45-degree lean in the "Smooth Criminal" music video
• Hedy Lamarr (U.S. Patent No. 2,292,387, 1942): The legendary Hollywood actress co-invented "frequency-hopping spread spectrum" communication technology, which became foundational to modern WiFi, Bluetooth, and GPS systems

These examples illustrate that patents protect practical solutions across an extraordinary range of complexity -- from simple mechanical devices to communications technology that changed the world.

Can Software Be Patented?

Software patentability is one of the most nuanced areas in modern patent law, and the rules vary significantly across jurisdictions.

United States: Yes, with Important Limitations

Following the Supreme Court's Alice Corp. v. CLS Bank decision (2014), software patents in the U.S. must demonstrate "significantly more" than an abstract idea. Pure algorithms, mathematical methods, and business rules implemented by generic computer processing are generally not patentable. However, software that produces a concrete technical improvement -- faster processing, reduced memory usage, improved data security, novel user interface interactions -- remains patentable.

The USPTO's 2024 guidance on patent-eligible subject matter under 35 U.S.C. Section 101 provides a two-step test: (1) determine whether the claim is directed to a judicial exception (abstract idea, law of nature, natural phenomenon), and (2) if yes, determine whether additional elements transform the claim into patent-eligible subject matter.

Europe: Technical Character Required

The EPO grants patents for "computer-implemented inventions" -- software that produces a "further technical effect" beyond the normal physical interaction between software and hardware. The key question is whether the software makes a technical contribution to the state of the art.

Examples of patentable software at the EPO include: image processing algorithms that improve compression efficiency, control systems that optimize industrial processes, and AI models that improve the technical performance of a device.

Practical Strategies for Software Patents

• Describe your software innovation as a method or process, not as code
• Emphasize the technical problem being solved and the technical effect achieved
• If your software interacts with hardware, draft claims covering both the method and the apparatus
• Avoid claim language that reads as pure mathematical algorithms or business rules

Can Business Methods Be Patented?

In most jurisdictions, business methods as such are not patentable. However, the boundary between a non-patentable "business method" and a patentable "computer-implemented technical process" has been the subject of extensive litigation worldwide.

In the United States, business method patents faced significant restriction after the Alice decision, but they are not categorically excluded. A business method implemented through a novel technical process that produces a concrete technical improvement may still qualify for patent protection.

In Europe, the EPO explicitly excludes "methods for doing business" from patentability. However, if the business method is implemented using technical means that make a technical contribution, the technical aspects may be patentable.

The practical lesson: focus your patent claims on the technical implementation, not the business concept itself.

What CANNOT Be Patented?

While the boundaries vary by jurisdiction, the following categories are generally excluded from patent protection across most systems:

1. Laws of nature and natural phenomena: Discovering gravity or a new mineral deposit is not patentable (though applications of natural phenomena may be)
2. Abstract ideas and mathematical methods: Pure algorithms, mathematical formulas, and theoretical models (though their application to solve specific technical problems may be patentable)
3. Scientific theories: E=mc^2 is not patentable, but a device that exploits mass-energy equivalence could be
4. Methods of medical treatment: In most countries outside the U.S., methods of surgery and therapy performed on the human body are excluded (but medical devices and pharmaceutical compositions are patentable)
5. Plant and animal varieties: Generally excluded from patent protection (but may be protectable through plant variety rights or plant patents in the U.S.)
6. Inventions contrary to public morality: Inventions whose commercial exploitation would be contrary to ordre public or morality
7. Mere presentations of information: Simply displaying information in a new format, without a technical effect, is not patentable

The AI Inventor Question (2026 Update)

One of the hottest topics in patent law today is whether AI-generated inventions can be patented. The current consensus across major patent offices (USPTO, EPO, UKIPO, CNIPA) is that an AI system cannot be listed as an inventor -- only natural persons can be inventors. However, if a human uses AI as a tool in the inventive process and makes a substantive intellectual contribution to the resulting invention, that human can be named as the inventor and the invention can be patented.

The DABUS cases -- in which an AI system was listed as the sole inventor -- were rejected by the USPTO, EPO, and UK courts, but accepted in South Africa and partially in Australia (later reversed). This area of law continues to evolve rapidly.

Frequently Asked Questions

Q: My improvement is very small. Can I still get a patent?

A: Yes. Patent law does not require revolutionary breakthroughs. A small structural improvement, a new combination of known elements, or an optimized manufacturing step can all be patentable if they meet the novelty and inventive step requirements. According to the EPO, the majority of granted patents represent incremental improvements to existing technology. Utility model patents, where available, have even lower inventive step requirements and are specifically designed for such innovations.

Q: Do I need a working prototype before filing?

A: No. Patent applications require a written description sufficient for a skilled person to reproduce the invention -- not a physical prototype. However, for certain fields (particularly chemistry, biotechnology, and pharmaceuticals), you may need to provide experimental data demonstrating that the invention works as described. In most engineering and software fields, a detailed written description with drawings or flowcharts is sufficient.

Q: Can I patent technology I am already using or selling?

A: It depends on timing and jurisdiction. In the United States, you have a 12-month grace period from your first public disclosure (including sales, demonstrations, or publications) to file a patent application. In Europe and most other major jurisdictions, there is no meaningful grace period -- any public disclosure before filing destroys novelty. The safest approach is always to file before any public disclosure.

Q: Can I file both a utility patent and a utility model on the same invention?

A: In jurisdictions that offer both (such as China, Germany, Japan, and South Korea), yes. This "dual filing" strategy is common and strategically valuable. The utility model grants quickly, providing immediate protection, while the utility patent undergoes full examination. If the utility patent is granted, you typically abandon the utility model to receive the longer-term, more robust protection of the invention patent.

Assess Your Innovation's Patent Eligibility

Not sure whether your technology qualifies for patent protection? Our AI-powered patent analysis tool can quickly evaluate your technical solution's novelty and patentability, providing expert-level assessment and actionable filing recommendations.