共 50 条
- [1] PATENTS, RESEARCH AND DEVELOPMENT, AND MEASUREMENT OF INVENTIVE ACTIVITY [J]. JOURNAL OF INDUSTRIAL ECONOMICS, 1966, 15 (01): : 26 - 37
- [2] PATENTS AND INVENTIVE EFFORT [J]. JOURNAL OF SCIENTIFIC & INDUSTRIAL RESEARCH, 1961, A 20 (09): : 475 - &
- [4] Determining an inventive step for chemical patents [J]. FUTURE MEDICINAL CHEMISTRY, 2011, 3 (15) : 1851 - 1854
- [6] Patents and publications as sources of novel and inventive knowledge [J]. Scientometrics, 2009, 79 : 551 - 561
- [7] Evaluating inventive activity: the cost of nineteenth-century UK patents and the fallibility of renewal data [J]. ECONOMIC HISTORY REVIEW, 2003, 56 (03): : 537 - 562
- [10] The Level of Inventive Activity [J]. JOURNAL OF THE PATENT OFFICE SOCIETY, 1954, 36 (12): : 883 - 899