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100 1 _aRademaker, Charles A.
245 0 0 _aThe classification of patents in the United States Patent Classification system
650 _aPatentklassifikation
_93471
650 _aUSA
_94716
650 _aBiopatent
_93606
773 0 _aWPI. 22(2000),4,301-307
_wz_WPI
999 _c1616
_d1616