Introduction

In the five-step patentability search methodology, understanding the invention is the first step, yet it is often seriously underestimated. Many searchers rush to database searches the moment they receive a Technical Disclosure, overlooking a critical preliminary question: Do you truly understand this invention?

If you do not accurately understand the invention, your subsequent search direction, comparative analysis, and patentability assessment will all rest on a flawed foundation. This article focuses on the most fundamental step in patentability searching—how to systematically understand an invention and precisely identify the technical inventive points worth searching and protecting.

Why Understanding the Invention Is the Cornerstone of Patentability Searching

A Classic Counterexample

An inventor from a pharmaceutical company submitted a Technical Disclosure describing “an oral pharmaceutical formulation with improved release characteristics.” After a cursory reading, the patentability search personnel understood it as “a sustained-release tablet” and then conducted searches around “缓释制剂, sustained release, controlled release,” concluding that “Novelty and Inventive Step appear sound.”

What went wrong?

The true inventive point of this invention did not lie in “sustained release” itself—sustained-release formulations are an exceedingly mature technology. The real innovation lay in: it employed a specific three-layer structural design to achieve segmented release of the drug in different regions of the gastrointestinal tract, thereby maximizing bioavailability. The “three-layer structure with segmented release” was the core of the innovation, not a generic “sustained release.”

The consequence: because the patentability search direction deviated from the true inventive point, the search missed several key pieces of Prior Art on “multi-layer drug delivery systems.” After filing, the Examiner quickly located those references and rejected the application.

Lesson: A superficial understanding of the invention—off by a hairsbreadth, gone astray by a thousand miles.

Four Dimensions for Systematically Understanding an Invention

When you receive a Technical Disclosure (or after communicating with the Inventor), you should analyze it from the following four dimensions:

Dimension 1: The Technical Problem—What does this invention aim to solve?

Do not merely read the one or two sentences the Inventor has written under “Technical Problem to be Solved.” Probe deeper:

• Why are existing solutions inadequate? Are they ineffective? Too costly? Overly complex in process? Or is there simply no solution at all?
• What is the technical root cause of this problem? For example, “low drug absorption rate” is a problem; “low drug solubility leading to low absorption rate” is the technical root cause.
• Is this problem universal or specific to a particular scenario? An improvement limited to a specific material versus a methodology that can be generalized across domains.

Questioning technique: If you directly ask the Inventor “What technical problem does this invention solve?”, they will often simply repeat the contents of the Technical Disclosure. A better way to ask is: “Before your invention came along, how did people solve this problem? And why were those approaches not good enough?”

Dimension 2: The Technical Solution—How does this invention solve it?

Extract all searchable Technical Features from the Technical Solution. Focus on:

• Structural features: What physical structure or constituent parts are there? (e.g., comprising Component A and Component B, with A and B connected by means of C)
• Composition/material features: What materials or compositional combinations are used?
• Process/method features: What specific process steps or parameter conditions are involved?
• Functional features: What function does each constituent part perform? How do they cooperate with one another?

Granularity control: Too coarse, and details are missed; too fine, and the search scope becomes excessively narrow. A practical standard is—each Technical Feature should be “a unit that can be searched using a single keyword or classification number.”

Dimension 3: The Technical Effect—What improvement does this invention bring?

Technical Effect is the bridge connecting the “Technical Solution” and the “Inventive Step argument.” When analyzing Technical Effects, note:

• Quantitative evidence: Has the Inventor provided experimental data? What is the magnitude of the improvement?
• Causal relationship: Which specific Technical Feature produces this effect? (“Because A is adopted, Effect B is achieved.”)
• Predictability: Is this effect a linear improvement that “naturally follows from using a better material” (weak), or an unexpected breakthrough that “overturns prior understanding” (strong)?

Dimension 4: The Prior Art Background—On whose shoulders does this invention stand?

Before searching, use the “Background Art” description in the Technical Disclosure and your communication with the Inventor to understand the Inventor’s awareness of the Prior Art. This helps you to:

• Determine the starting point for the search (what does the Inventor consider the closest solution?)
• Identify technical directions the Inventor may have overlooked (competing technologies they may not be aware of)
• Verify whether the Inventor’s identification of the “Inventive Points” is reasonable

Understanding the Invention Checklist

Before formally commencing the search, conduct a self-check using the following checklist:

Regarding the Technical Problem:

• [ ] Can I articulate in a single sentence the Technical Problem this invention aims to solve?
• [ ] Do I know why existing solutions are inadequate?
• [ ] Do I understand the technical terminology and professional conventions of this field?

Regarding the Technical Solution:

• [ ] Have I completely extracted all key Technical Features?
• [ ] Can I distinguish which are “Essential Features” (that an Independent Claim must include) and which are “Preferred Features”?
• [ ] Do I know the function and effect of each Technical Feature?

Regarding Inventive Points:

• [ ] Can I clearly identify the 1–3 core aspects that distinguish this invention from the Prior Art?
• [ ] Does my understanding of the “core Inventive Points” align with that of the Inventor?
• [ ] Is my understanding of the Inventive Points based on specific features that “can be found reflected in the Claims,” rather than vague generalizations?

Regarding Prior Art:

• [ ] Do I know what the Inventor considers the closest Prior Art solution?
• [ ] Can I anticipate which types of technology are likely to “collide” with this invention?

Techniques for Effective Communication with the Inventor

In many cases, a Technical Disclosure cannot fully convey all technical information. Direct communication with the Inventor is the best way to bridge information gaps.

Strategies for Effective Questioning

Avoid asking questions like these:

• “Is your invention innovative?” (Too vague—the Inventor will of course say yes)
• “Is there anything else you’d like to add?” (Does not trigger deep thinking)

Consider asking questions like these instead:

• “If you were explaining this invention to another engineer in the same field, what key points would you emphasize?”
• “During the R&D process, what approaches did you try that turned out not to work? Why?”
• “Is there any technical background that you feel ‘everyone in the field knows’ but someone like me, as a layperson, might not understand?”
• “If an Examiner said, ‘After looking at your solution, I can tell at a glance how to modify it,’ how would you rebut that?”

Key Points to Record During Communication

• The “key distinctions” that the Inventor repeatedly emphasizes
• Experimental data and comparative results provided by the Inventor
• The Inventor’s knowledge of competitors’ technologies
• The precise meaning and usage context of technical terms

Common Pitfalls

“The Technical Disclosure is quite clear—let’s just search directly”

Many Inventors are not patent professionals, and when drafting a Technical Disclosure they may:

• Omit background that is “obvious” to a Person Skilled in the Art (but not obvious to a layperson)
• Describe Inventive Points in excessively broad terms (e.g., “an improved XXX”)
• Use non-standard terminology or coined terms

Solution: Even if the Technical Disclosure appears exhaustive, a supplementary communication session is advisable.

“I am from this field—I understand it at first glance”

Even if the patentability search personnel have a relevant technical background, two risks may exist:

• Overconfidence: Assuming you have understood, when in fact your understanding is inaccurate
• The “Person Skilled in the Art” trap: You may unconsciously supplement the contents of the Technical Disclosure with your “own knowledge,” thereby underestimating the true Inventive Step of the invention

Solution: Maintain a posture of “inquisitive diligence,” using a feature checklist to force yourself to confirm each item one by one.

“The Inventive Point is simply whatever the Inventor says it is”

Inventors sometimes overestimate or underestimate the Inventive Points of their own inventions. For example:

• What they believe to be highly innovative may merely be a routine practice in the field (insufficient Inventive Step)
• What they believe to be routine may, in fact, be where the true innovation lies in the sense of patent law

Solution: The responsibility of the patentability search personnel is to make an independent judgment while respecting the Inventor’s technical knowledge. The final determination rests on the Prior Art search results.

Case Study: Accurately Identifying the Inventive Point

Scenario: A materials company invented a “high-strength lightweight concrete.” The core of the Technical Disclosure description was “the addition of carbon fiber.”

Initial understanding: The patentability search personnel initially understood it as “carbon-fiber-reinforced concrete,” a direction on which there was already substantial published literature. Inventive Step appeared questionable.

After in-depth communication: Following communication with the Inventor, it was discovered that the true innovation did not lie in “adding carbon fiber,” but in:

• The carbon fiber had undergone a specific surface pretreatment process (plasma treatment + silane coupling agent grafting)
• This pretreatment significantly enhanced the durability of the carbon fiber in the alkaline environment of concrete
• The dispersion method for the carbon fiber was also innovative (employing a specific stepwise dilution dispersion method)

Redefining the Inventive Point: Revised from “carbon-fiber-reinforced concrete” to “a reinforcement method that achieves long-term stability of carbon fiber in concrete through a specific surface pretreatment and dispersion process.”

Patentability search result: Searches focused on “carbon fiber surface pretreatment + concrete dispersion” did not uncover highly similar Prior Art. Ultimately, the invention successfully obtained an invention patent grant.

Lesson: For the very same invention, the accuracy with which the Inventive Point is identified can make the difference between a patentability search conclusion being worlds apart.

Key takeaway: Understanding the invention is the cornerstone of patentability searching. Systematically analyze it across the four dimensions of the Technical Problem, the Technical Solution, the Technical Effect, and the Prior Art background; validate the completeness of your understanding using a checklist; and bridge information gaps through effective communication with the Inventor. The precision with which Inventive Points are identified directly determines the success or failure of the entire patentability search. Teams that need repeatable patent search workflows can also use PatSnap Analytics to organize technical fields, prior art, and search results.