La Chaux-de-Fonds, CH
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Patent Grant
Ecole d'Ingénieurs ARC
Herbert Keppner
B05 - SPRAYING OR ATOMISING IN GENERAL APPLYING LIQUIDS OR OTHER FLUENT MATER...
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Patent Application
Herbert Keppner
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
