An evaluation of patent searching resources: comparing the professional and free on-line databases

Paul Schwander، نويسنده ,

روزنامه با شماره پیاپی سال 2000

19

147

165

Commercial databases , Internet , Subject directory , Comparitive review , IPC , Citation analysis , State-of-the-art , Relevancy , Added value , Derwent , Keywords , Esp@cenet , Search engines , Competitor analysis , Free databases , statistics

World Patent Information

2000

World Patent Information

273861