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_aIPC development in the electric age : _bthe view of the International Bureau of WIPO |
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_aInternationale Patentklassifikation _92098 |
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| 650 |
_aWeltorganisation für Geistiges Eigentum _95093 |
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| 650 |
_aInternationales Büro _92122 |
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| 773 | 0 |
_aWPI. 21(1999),3,191-196 _wz_WPI |
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