Abstract
Unmanned aerial vehicle’s industry grows very fast. Based on market research company, Gartner, it shows that drone’s sale would be up to 220 million units and revenue could be up to 4.5 billion dollars. Unmanned aerial vehicle’s industry has a prosperous future, so there are more and more applications in commercial and industrial fields. Although drone’s market is very hot, there are still many technological problems which need to be solved. One of important problems is the limited time of flight. Based on report, nearly 50% of drones can’t fly over 30 minutes. It’s a serious limitation for drone to apply in commercial and industrial fields, due to bad battery duration. As a result, this paper want to use the prospect of patent analysis to analyze different technologies which can raise the time of flight and patent assignees. It will provide some helpful information for someone who wants to enter the Unmanned aerial vehicle’s industry.