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Application filed by Ingenioer De Bergue & Company, Ingenioer Richard ShawfiledCriticalIngenioer De Bergue & Company
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Publication of DK27468CpublicationCriticalpatent/DK27468C/da
Fremgangsmaade til Forøgelse af Metallers og Legeringers, særlig Aluminiumlegeringers, Haardhed, Styrke og Bearbejdelighed ved Hærdning af dem ved Varme.