000 00411naa a22001577c 4500
001 8456
003 OSt
005 20190814161045.0
007 t|
008 190702s xxu||||| |||| 00| 0 d
100 1 _aValkonen, Pekka
700 1 _aNykänen, Olli
245 0 0 _aAn expert system for patent classification
650 _aInternationale Patentklassifikation
_92098
773 0 _aWPI. 13(1991),3,143-148.
_wz_WPI
999 _c5276
_d5276