Introduction

In patentability search work, the difference between novelty vs inventive step is impossible to avoid: Novelty and Inventive Step (or Non-obviousness) are two separate thresholds for patent grant. Yet many inventors and business managers often conflate them, even using vague phrases like “this invention is innovative” in patentability search reports to gloss over the distinction.

The problem is this: Novelty and Inventive Step are two entirely different legal assessments. An invention may possess novelty but lack an inventive step — though the reverse does not hold: an invention that lacks novelty necessarily also lacks an inventive step (novelty is the logical prerequisite for inventive step). Confusing the two may lead to wrong filing decisions — hesitating to file when you should, and filing with full confidence when you should not.

This article will systematically unpack the legal meaning, assessment methodology, and key differences between novelty and inventive step, helping you establish a clear judgment framework.

Novelty: Is Your Invention “Exactly the Same” as the Prior Art?

Legal Definition

Under Article 54 of the European Patent Convention (EPC Art. 54), novelty means that an invention does not form part of the state of the art.

Breaking this down, the core assessment of novelty involves two levels:

Level One: Does it Belong to the “State of the Art”?

Under EPC Art. 54(2), the state of the art comprises everything made available to the public by means of a written or oral description, by use, or in any other way, before the filing date (or priority date) of the patent application. “Made available to the public” here encompasses three modes:

• Publication disclosure: print or electronic publications anywhere in the world, including patent documents, scientific journals, books, product manuals, etc.
• Use disclosure: making technical content accessible to the public through manufacture, use, sale, exhibition, etc.
• Other forms of disclosure: such as oral disclosure, internet disclosure, etc.

Level Two: Is There “Secret Prior Art” (Earlier European Applications — EPC Art. 54(3))?

EPC Art. 54(3) provides that the content of European patent applications with an earlier filing date and a later publication date is also considered part of the state of the art for the purpose of assessing the novelty of a later application (the “whole-contents” approach). This mechanism prevents duplicate patent grants on technologies that have been “filed first” but not yet published.

The Novelty Assessment Standard: The “Single Document Comparison” Principle

Novelty assessment has one core principle — single document comparison. This means that only a single piece of prior art may be compared with the present invention; two or more documents may not be combined when evaluating novelty.

The assessment formula is simple:

If a single prior art document explicitly discloses (or implicitly discloses) all technical features of the present invention, then the invention lacks novelty.

It is particularly important to note that the following circumstances also constitute “lack of novelty”:

• A specific concept destroys the novelty of a generic concept (e.g., if the prior art discloses “copper,” then “metal” lacks novelty)
• A specific numerical value falls within a numerical range disclosed in the prior art

Conversely:

• A generic concept does not destroy the novelty of a specific concept (prior art disclosing “metal” does not affect the novelty of “copper”)

Inventive Step: Is Your Invention “Obvious” to a Peer?

Legal Definition

Under Article 56 of the European Patent Convention (EPC Art. 56), an inventive step means that, having regard to the state of the art, the invention is not obvious to a person skilled in the art.

There are three key elements in this definition:

• Non-obviousness (Not Obvious): To a “person skilled in the art,” the invention is not obvious — this is the core assessment criterion for inventive step.
• Person Skilled in the Art: A legally constructed “person” who possesses all ordinary technical knowledge in the field before the filing date, has access to all prior art in the field, but lacks any inventive capability.
• State of the Art as a Whole: When assessing inventive step, what is considered is whether the state of the art as a whole provides a teaching or suggestion that would lead to the invention.

The Inventive Step Assessment Method: The “Problem-Solution Approach”

The European Patent Office (EPO) Guidelines for Examination prescribe the Problem-Solution Approach for assessing inventive step — this is the most systematic core methodology in patentability search and comparison worldwide:

Step One: Determine the Closest Prior Art

From the prior art retrieved, select a document that belongs to the same technical field as the invention, addresses the most similar technical problem to be solved, and discloses the greatest number of technical features, as the “closest prior art.”

Step Two: Determine the Distinguishing Technical Features and the Objective Technical Problem Actually Solved

Compare the invention with the closest prior art to identify the distinguishing technical features, and then, based on the technical effect achievable by those distinguishing features, determine the “objective technical problem” actually solved by the invention.

Note: This “objective technical problem” may differ from the problem originally asserted by the inventor — it is reformulated based on an objective comparison.

Step Three: Assess Whether It Is Obvious

Starting from the closest prior art and the objective technical problem actually solved, assess whether the claimed invention would have been obvious to a person skilled in the art. If there exists in the prior art a technical teaching that would have prompted the skilled person to apply the distinguishing features to the closest prior art to solve that technical problem, then the invention is obvious and lacks an inventive step.

Technical teachings may come from:

• The distinguishing feature being common general knowledge (e.g., a routine measure recorded in textbooks)
• Another cited document disclosing the distinguishing feature, where its function is the same as in the present application
• Other cited documents providing an explicit technical teaching

Secondary Indicia

Beyond the Problem-Solution Approach, the EPO Guidelines for Examination also recognize certain secondary indicia. When the conclusion of the Problem-Solution Approach is not sufficiently clear, the following factors may support a finding of inventive step:

• The invention solves a long-felt but unresolved technical problem
• The invention overcomes a technical prejudice
• The invention achieves an unexpected technical effect
• The invention has achieved commercial success (and that success is directly attributable to the technical features)

Novelty vs. Inventive Step: Core Differences at a Glance

Common Misconceptions

Misconception One: “If Novelty Is Satisfied, Inventive Step Is Definitely Satisfied Too”

This is the most common misunderstanding. Novelty is a prerequisite for inventive step (what lacks novelty naturally lacks an inventive step), but the reverse does not hold — an invention that possesses novelty may still lack an inventive step due to obviousness.

Example: An inventor uses a known material A to manufacture a known product B. If no document has ever described “using A to manufacture B,” novelty is established. However, if both A and B are known, and using A to manufacture B would have been readily conceivable to a person skilled in the art (for instance, A is an upgraded material intended to replace B’s original material), the invention may lack an inventive step.

Misconception Two: “My Invention Produces Better Results, So It Has an Inventive Step”

A better technical effect is one of the secondary indicia for inventive step, but it is not a sufficient condition. If the better technical effect is merely an “expected quantitative change” (e.g., a faster processor naturally computes faster), it cannot establish an inventive step. What is needed is an “unexpected technical effect” (a qualitative change) to serve as a persuasive argument.

Misconception Three: “The Patentability Search Didn’t Find an Exact Match, So It’s Novel”

Novelty requires only a single document to disclose all technical features in their entirety. However, in examination practice, the “implicit disclosure” in a document may also destroy novelty. For example, if a document does not explicitly state a certain parameter, but implementing the disclosed solution necessarily yields that parameter, the parameter is considered “implicitly disclosed.”

Real-World Case: Novelty Present, Inventive Step Absent

Scenario: A medical device company developed a surgical forceps with a temperature display function. The technical solution is: an electronic temperature sensor and a miniature LCD display are added to the handle of an existing surgical forceps, displaying the forceps tip temperature in real time during surgery.

Patentability Search Results:

• A search did not reveal any document describing “surgical forceps + temperature sensor + display” → Novelty is established
• However, the search did reveal:
• Cited Document 1: A surgical instrument with a temperature sensor (closest prior art)
• Cited Document 2: A technical solution for adding an LCD display to a hand-held tool
• Common general knowledge: The circuit connection between an electronic temperature sensor and an LCD display is routine technology

Inventive Step Analysis (Problem-Solution Approach):

1. Closest prior art: Cited Document 1 (a surgical instrument with a temperature sensor)
2. Distinguishing feature: A display added to show temperature in real time / Objective technical problem actually solved: How to enable a surgeon to read temperature data more conveniently
3. Technical teaching: Cited Document 2 discloses adding a display to a hand-held tool for displaying sensor data, and its function is “convenient data reading,” which is the same as in the present application. A person skilled in the art would have had the motivation to combine the two.

Conclusion: The combination of Cited Document 1 + Cited Document 2 + common general knowledge destroys inventive step.

Lesson: The inventor focused only on whether anyone had “made exactly the same thing,” without assessing whether this improvement was too “obvious.” A proper patentability search must evaluate both novelty and inventive step. For broader patent intelligence workflows, see PatSnap Analytics.

Key Takeaways

1. Novelty and inventive step are two independent thresholds: assess novelty first, then inventive step; neither step can be skipped.
2. Novelty = Single document comparison: as long as a single document discloses all technical features, novelty is destroyed.
3. Inventive Step = Problem-Solution Approach + Combination of documents: multiple documents may be combined; the key question is whether something is “obvious.”
4. The “Person Skilled in the Art” is a critical construct: they know everything but have no creativity.
5. A patentability search report must separately provide conclusions on both novelty and inventive step; they cannot be lumped together as “this invention has technical merit.”

Next Step

Now that you understand the difference between novelty and inventive step, the next thing you need to know is: at what point in the entire innovation lifecycle should a patentability search be conducted? The value of a search varies dramatically depending on the stage at which it is performed. Continue reading the next article in this series: Key Timing Points for Patentability Search in the Innovation Lifecycle. Teams can also explore AI-assisted patentability search tools when building a repeatable workflow.

Key Takeaway: Novelty assesses “does an identical thing exist?” (single document comparison); inventive step assesses “is it easy to think of?” (Problem-Solution Approach + combination of documents). These are independent legal conditions, and a patentability search must evaluate each separately.