Chinese core journals in science and technology
Chemical Abstracts Service (CAS) database
EBSCO Academic Database in the United States
Japan Science and Technology Agency Database (JST)
The paper searched and analyzed statistically the patents related to the 4 biggest gold groups in China,compared the patent application status,patent technology portfolio,applicant distribution and technology domain,and patent technology value of the 4 biggest gold groups,revealed the inpidual technological development advantages and layout trend,and provided reference and guidance for reasonable layout and innovative adjustment of patented technology between the 4 biggest gold groups and other gold enterprises.