This blog post examines how the patent system protects inventions and contributes to industrial development and enhancing national technological competitiveness.
The patent system is a mechanism designed to promote national industrial development by protecting and encouraging inventions. It grants patent rights to patent applicants, ensuring they can hold exclusive rights to the invention for a specified period. To obtain patent rights for an invention, applicants must meet certain requirements. The document reviewed during this examination process is the patent application specification.
Among the contents described in the patent application specification, the ‘Claims’ clearly define the scope of protection sought by the applicant, i.e., the scope of rights. This section consists of one or more claims describing the necessary methods, functions, structures, and combinations required to explain the invention. An example is as follows.
[Claim 1] A chair composed of metal and plastic
[Claim 2] In the chair of Claim 1, wherein the metal is iron
[Claim 3] In the chair of Claim 2, wherein the chair is constructed including wood
In the above example, [Claim 1] is an independent claim that alone defines the scope of the invention, while [Claim 2] and [Claim 3] are dependent claims that refer to other claims. Claim 2 limits a part of the invention described in another claim, while Claim 3 adds a new feature to the invention described in another claim. Dependent claims can cite not only the independent claim but also other dependent claims. They present various technical features and limiting elements, resulting in a narrower scope of protection than the independent claim.
One crucial element in drafting a patent application specification is the clear description of the invention. The specification must detail the invention’s background, purpose, the problem it solves, and specific implementation methods. This detailed description plays a vital role in interpreting the patent claims and is essential for clarifying the scope of the patent holder’s rights. Therefore, thoroughly understanding the invention and accurately expressing it is paramount when drafting the specification.
Furthermore, the claims serve as the basis for judging novelty and inventive step—the requirements for patentability—by comparing the invention to the prior art known to the public during patent examination. When examining these requirements by comparing the content of the invention described in the claims with the prior art, novelty is determined by whether the invention is identical to the prior art, and inventive step is determined by whether the invention could have been easily derived from the prior art.
To establish novelty, not only must the physical identity of the invention’s components be completely absent—meaning they are not included within the components of prior art—but also the substantive identity, meaning similarity in the effects of the invention compared to prior art, must be negated. Accordingly, if the components of the invention described in the claims are a higher-level concept and the components of prior art are a lower-level concept, identity is deemed to exist, and novelty is generally denied.
If an invention possesses novelty, the next step is to examine whether it possesses inventive step. If it is determined that a person skilled in the art could easily predict or derive the invention based on prior art within the level of knowledge ordinarily known in the field, inventive step is not recognized. Therefore, if the invention merely substitutes components of the prior art or simply combines different elements of the prior art, it cannot obtain a patent right because it lacks inventive step, even if it possesses novelty.
The patent holder is granted exclusive and exclusive rights for the patented invention. Therefore, if a person without legitimate authority is deemed to have infringed their patent right, they can protect that right through the patent system. Unlike tangible objects, patent rights are intangible, making them susceptible to imitation and plagiarism. However, since it is difficult to detect infringement, the patent system defines not only direct infringement but also acts that are expected to lead to future direct infringement as indirect infringement, treating them as patent infringement.
Direct infringement occurs when an invention falling within the scope of the patented invention is commercially practiced without the patent holder’s permission. To prove whether the ‘subject invention under review’ infringes the patent rights, one must first confirm and interpret the scope of the claims of the existing patented invention to determine the scope of the patent holder’s rights. The principles applied when interpreting the scope of the patent holder’s rights include the principle of complete elements and the doctrine of equivalents.
The principle of complete elements holds that the subject invention falls within the scope of the patent holder’s rights only if it implements all the elements described in the claims of the existing patented invention. For example, if the components described in the claims of the existing patented invention are “X+Y”, then implementing only “X” or ‘Y’ in the subject invention, or implementing “X+Y’”, would not be considered infringement. However, implementing “X+Y” or implementing “X+Y+Z” would be considered infringement. However, this principle has the problem that if the subject invention modifies or deletes only secondary elements while maintaining the essential function of the existing patented invention, patent infringement is not recognized.
The doctrine of equivalents is applied to address this issue. According to this doctrine, if the subject invention is implemented as “X+Y’”, even if it does not perfectly match the components of the existing patented invention, Y and Y’ are considered equivalent if their principles or effects are identical. Therefore, the subject invention is recognized as infringing the existing patented invention.
Meanwhile, indirect infringement refers to acts that, while not direct infringement themselves, are expected to infringe the patent right if left unchecked. This can be divided into cases involving ‘inventions relating to articles’ and ‘inventions relating to methods’. If the existing patented invention is an article, implementing other elements necessary solely for producing that article for commercial purposes constitutes indirect infringement. Accordingly, selling all components of the patented article, rather than the finished product itself, constitutes indirect infringement because it ultimately enables the assembly of the article and facilitates the practice of the patented invention. Similarly, when the existing patented invention is a method, the commercial practice of an article used solely for implementing that method constitutes indirect infringement.
The importance of the patent system extends beyond merely protecting inventions. By safeguarding inventions, it stimulates research and development (R&D) activities and fosters an environment where creative and innovative ideas receive economic rewards. This motivates companies to continuously invest in technological development and serves as an opportunity for nations to enhance their technological competitiveness. In this regard, the patent system functions as a driving force for national economic development, transcending the level of merely protecting individual inventions.
The patent system also plays a crucial role in international trade. Securing patent rights in the global market allows inventions to be protected not only domestically but also overseas. This promotes international technological cooperation and trade, contributing to narrowing the technological gap between nations. For example, when an innovative technology developed in one country is protected by patent rights, other countries are more likely to purchase licenses or establish cooperative relationships to use that technology. This brings positive effects, simultaneously promoting global technology diffusion and economic growth.
In conclusion, the patent system plays a crucial role in promoting national industrial development by protecting and encouraging inventions. Preparing patent application specifications and defining patent claims are essential processes for clarifying the scope of rights for an invention and securing patent rights. By verifying the originality of an invention through novelty and inventive step examinations and granting patent rights based on this, technological advancement is encouraged. Therefore, the patent system is a core means of enhancing national competitiveness, requiring continuous attention and improvement.
