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With the insufficient supply of food and the importance of food security, cereals or vegetables planted by plant factory has become the focal point in recent years. The plant factory is a closed growing system which enables a farmer to achieve constant production of vegetables all year around. The facility utilizes artificial control of light, temperature, moisture, and carbon dioxide concentrations. In Taiwan, many enterprises and academic institutes research on the technical issues on plant factory. The purpose of this study is to understand the current status of enterprises and academic institutes by using patent analysis, to try to find the technology gaps, and to look forward to boost the patent promotion. Finally it is to make the patented technology more useful. This study is discovered the patents owned by enterprises and academic institutes and found the international patent classification (IPC) of the each technology category of plant factory. The IPC is used in many patent systems in the world. It is more efficient to invent through patent search if we can control the specified IPC.
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