What are the main fields of derwent patents?

Chemistry, electronics, electricity and engineering. Patent owners in derwent not only have a huge amount of patent information, but also involve a wide range of fields, mainly divided into three major fields: chemistry, electronics and electricity, and engineering. Derwent is a Belgian football player and goalkeeper. He has played for Belgian Westerlo Football Club for many years, and since 20 12, he has played for Dutch powerhouse Alkmar Football Club.