共 50 条
[32]
Trends of 1995, 1996 & 1997 for companies issuing US Patents.
[J].
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY,
1998, 216
:U357-U357
[36]
PATENTS .6. COOPERATIVE PATENT AGREEMENT AND EUROPEAN PATENT AGREEMENT
[J].
WERKSTATTSTECHNIK ZEITSCHRIFT FUR INDUSTRIELLE FERTIGUNG,
1979, 69 (07)
:447-448
[37]
Trends of 1999, 2000 & 2001 for top companies issuing US patents.
[J].
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY,
2002, 224
:U389-U389
[38]
A study on evaluation model for patent property right using machine learning techniques: An empirical study of korean patents
[J].
ICIC Express Letters, Part B: Applications,
2015, 6 (12)
:3341-3347