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14 October 2019
The most recent amendments to the Patent Act, which were passed and enacted on 17 May 2019, have modified Japan's patent litigation system to make it more favourable to patentees (especially small and medium-sized enterprises (SMEs) and start-ups) in terms of evidence collection and the calculation of damages.
Japan's patent litigation system has often been said to offer insufficient protection to patentees. This is because although the burden of proof for patent infringement is quite high, Japan has not adopted a broad US-style discovery system. Therefore, plaintiffs (ie, patentees) have to play a leading role in collecting and presenting to the courts evidence on which to base claims of infringement and damages. As a result, it can be difficult for patentees to bring their cases, and the damages amounts awarded by the Japanese courts tend to be smaller compared with those of courts in the United States and elsewhere. Although criminal liability is provided for in the Patent Act, the police rarely take on these cases due to the complexity of the matters. Thus, patentees cannot rely on evidence collected by the police. In addition, although patentees can claim compensation for damages and injunctions, the Japanese courts – unlike those in the United States – cannot award punitive damages. As such, any compensation is usually insufficient to cover the patentee's damages and act as a deterrent against patent infringement.
Further, as open innovation has progressed, there has been an increasing need to create a patent litigation system which enables SMEs and start-ups to take advantage of their groundbreaking technology.
In this context, the 2019 revisions to the Patent Act aim to improve the effectiveness of the patent litigation system and become more patentee friendly by introducing:
Onsite inspections by experts
Under the new onsite inspection process, on a patent owner's request and if certain prescribed requirements are met, the courts may order an independent third-party expert to:
This system is expected to be used in patent litigation in technological fields in which conventional procedures for collecting evidence are insufficient to obtain evidence of patent infringement, such as in cases involving patents on:
The 2019 revisions regarding the new onsite inspection process have introduced measures to mitigate any risk of trade secret misappropriation (described below). As such, strict requirements apply to this new system:
This new evidence collection system will come into force on a date within one-and-a-half years from 17 May 2019. The exact date will be designated by a Cabinet order.
The 2019 revisions to the Patent Act also introduced a new methodology to calculate damages, which will come into force on a date within one year from 17 May 2019. The exact date will be designated by a Cabinet order.
Determination of damages for portion beyond patentee's production or sales capacity
Under Article 102(1) of the current Patent Act – which provides a rebuttable presumption of the amount of damages and lost profit – compensation for such damages and lost profits which arise from patent infringement are presumed to be calculated by multiplying the amount of expected profits as per the number of product units that the patentee would have earned had there been no infringement by the number of products sold by the infringer, subject to limitations arising from the patentee's capability. Under the amendments, patentees may seek:
As a practical example, if an infringer's profit per unit is $50 (A), the volume of infringing products is 100 units (B) and the patentee has the capacity to produce only 60 units (C):
Figure 1. From "Review of the Patent Litigation System", Japan Patent Office, 2019
Increase in sum equivalent to licensing fee
Under the current Patent Act, patentees may claim compensation from an infringer for damages up to the amount that they would have been entitled to receive for the use of the patented invention.
Once the new methodology takes effect, the law explicitly stipulates that the courts may determine the amount of reasonable royalties to be paid as compensation by considering the amount that the patentee would have been entitled to receive if it and the infringer had entered into an agreement, on the basis that the patent is valid and has been infringed.
For further information on this topic please contact Takuya Mima at Nishimura & Asahi by telephone (+81 3 6250 6200) or email (email@example.com). The Nishimura & Asahi website can be accessed at www.jurists.co.jp.
The materials contained on this website are for general information purposes only and are subject to the disclaimer.
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