共 35 条
[5]
[Anonymous], 2001, NBER PATENT CITATION
[6]
[Anonymous], 2009, RIETI DISCUSSION PAP
[7]
[Anonymous], 2009, RIETI DISCUSSION PAP
[8]
[Anonymous], 1986, 2083 NBER
[9]
[Anonymous], 2009, PATENT STAT MANUAL, DOI DOI 10.1787/9789264056442-EN
[10]
Carpenter M.P., 1981, World Patent Information, V3, P160, DOI DOI 10.1016/0172-2190(81)90098-3