Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Publication of NL22074CpublicationCriticalpatent/NL22074C/xx
B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
B23D73/00—Making files or rasps
B23D73/04—Methods or machines for the manufacture of files or rasps
B23D73/08—Milling, planing, slotting, knurling, or broaching the working surfaces