以中国、美国、德国、日本和韩国授权的发明专利样本为研究对象,对其中电学技术领域专利维持信息统计分析发现,五国授权的国内外专利的维持时间均值差异显著,且国内外专利的维持时间没有绝对大小关系;中国授权的国内外专利维持变化趋势差异大,而美德日韩四国授权的国内外专利维持趋势趋向一致;五国授权的国内外专利的维持变化趋势都有很大不同。The maintenance information of the relevant patents in the technical field of electrics,which were granted by China,America,Germany,Japan and Korea,is empirically analyzed.The study shows that there are many differences between domestic and foreign patents of the five countries in the maintenance time.And it is not correct that the mean maintenance time of the domestic patents is longer than that of the foreign patents,or vice verse.For the patents granted by America,Germany,Japan and Korea,the maintenance tendency of the domestic patents is similar to the foreign patents,while for those which were granted by China,the situation is different.And in terms of the maintenance tendency,no matter the domestic or the foreign patents,the results are distinctly diverse among the five countries.国家自然科学基金项目“专利维持机理及维持规律实证研究”(编号:71373221)资助成
