Dayton, OH, US
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Patent Grant
Cercona of America Inc.
Robert C. Schenck
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Patent Grant
Cercona, Inc.
Richard L. Helferich
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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Patent Grant
The Duriron Company, Inc.
Douglas A. Bogart
F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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Patent Grant
The Duriron Company, Inc.
Richard L. Helferich
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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Patent Grant
The Duriron Company, Inc.
Richard L. Helferich
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information
Patent Grant
The Duriron Company, Inc.
Richard L. Helferich
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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Patent Grant
The Duriron Company, Inc.
Russell K. Annis
C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
