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020 _a9788171772308
040 _cDSNLU
082 _a346.410 48
100 _aNarayanan,P.
_94463
245 _aPatent Law /
_cP.Narayanan
250 _a4th ed.
260 _akolkata:
_bEastren law House,
_c2010.
300 _a1021p.;
650 _aPatent Law
_94464
942 _2ddc
_cRBK
999 _c2094
_d2094