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1987-02-05
Perfume carrying clay
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1984-12-06
Perfume carrying clay
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1995-06-21
Method for utilising waste materials
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1989-11-01
Method for the depressing of hydrated silicates
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1990-03-28
Equipment for drawing of sheet materials
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1992-11-25
Method of application
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1991-07-17
Method of depressing readily floatable silicate materials
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1993-12-08
Lining of landfill sites
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1992-05-13
Method of producing building material
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1994-06-22
Process for the preparation of ketals
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1991-12-24
Method of depressing readily flotatable silicate materials
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1996-08-14
Disposal of waste material
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1994-12-28
Method for the compacting of moulding materials
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1989-09-27
Renovation of structures
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1992-10-07
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1994-09-09
Expression of pretective antigens
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1990-06-06
Methods of separating materials
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1994-03-28
Building material
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1992-07-22
Method of making surfacing materials
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1992-10-14
Blocks of sheet material
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1991-07-01
Method for the depressing of hydrated silicates
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1993-08-09
Method of obtaining gypsum based materials
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1992-10-23
Method for application of choledochoduodenostomy
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1992-06-03
Method of producing ceramic materials
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1992-10-14
Method of producing building material