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| 100 | 1 | _aEisenschitz, T. S. | |
| 700 | 1 | _aCrane, J. A. | |
| 245 | 0 | 0 | _aPatent searching using classifications and using keywords |
| 650 |
_aPatentklassifikation _93471 |
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| 650 |
_aVorprüfung _94887 |
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| 773 | 0 |
_aWPI. 8(1986),1,38-40. _wz_WPI |
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_c6604 _d6604 |
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