Patent holders need to have legal responses and strategies in place to protect their exclusive rights. Learn what constitutes direct and indirect infringement and how to respond.
A patentee is granted sole and exclusive rights to the patented invention. This means that the patentee has the exclusive right to protect and commercially exploit their invention. Therefore, if a patent holder believes that their patent rights have been infringed by an unauthorized party, they can seek protection through the patent system. Because patent rights are intangible and therefore easy to imitate and steal, while being difficult to detect, the patent system recognizes not only direct infringement, but also indirect infringement, which is defined as the anticipation of future direct infringement.
The patent system plays an important role in promoting technological innovation and advancement. Inventors are motivated to conduct research and development by receiving protection for their inventions, which in turn encourages the emergence of new inventions. However, this system of protection also creates the potential for complex legal disputes. When a claim of patent infringement is made, it becomes more than just a legal matter; it becomes a matter of competition between companies and a game-changer in the marketplace.
Direct infringement is the commercialization of an invention that falls within the scope of a patented invention without the patent holder’s permission. In order to prove whether an ‘identified invention’ infringes on an existing patented invention, the scope of the patentee’s rights must first be determined by identifying and interpreting the patent claims of the existing patented invention. The principles that apply when interpreting the scope of a patentee’s rights include the principle of component completeness and the principle of equivalents.
The principle of component completeness states that the invention to be verified falls within the scope of the patentee’s rights only if it implements all the components listed in the patent claims of the existing patented invention. For example, if the patent claims of an existing patented invention include ｢X+Y｣, it is not infringing if the verified invention performs only ｢X｣ or ｢Y｣ or performs ｢X+Y′, but it is infringing if it performs ｢X+Y｣ or performs ｢X+Y+Z｣. However, there is a problem with this doctrine in that it does not recognize patent infringement if the identified invention retains the essential function of the existing patented invention, but only modifies or deletes secondary elements.
To compensate for this problem, the doctrine of equivalents is applied. According to this principle, if the invention to be verified is implemented as ｢X+Y′, even if it does not completely match the components of the existing patented invention, if Y and Y′ are the same in principle or effect, then Y and Y′ are considered equal, and the invention to be verified is recognized as infringing the existing patented invention. The doctrine of equivalents is an important legal tool to ensure that patent holders’ rights are adequately protected without stifling technological innovation.
On the other hand, indirect infringement refers to behavior that is not a direct infringement, but which, if left unchecked, would be expected to infringe the patent rights, which can be categorized into two types: invention of an article and invention of a method. If the original patented invention is an article, the commercialization of other elements necessary only to produce the article constitutes indirect infringement. Accordingly, the sale of all the components of an article, rather than the patented finished product, constitutes indirect infringement because it enables the eventual assembly of the article and thus induces the practice of the patented invention. For the same reason, if an existing patented invention is a method, commercially practicing an article that is used only to practice the method is indirect infringement. These rules are designed to protect the rights of patent holders more broadly and to encourage inventors to be creative.
Patent infringement litigation is a complex process and requires a high level of legal knowledge, so it is important for patent holders to seek professional legal advice to prove infringement and protect their rights. During this process, patentees should thoroughly analyze their invention, clarify the legal basis, and establish their rights. This way, patent holders can protect their inventions and remain competitive in the market.
