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 NL53408CpublicationCriticalpatent/NL53408C/xx
B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
B24B41/00—Component parts such as frames, beds, carriages, headstocks
B24B41/04—Headstocks; Working-spindles; Features relating thereto
B24B41/047—Grinding heads for working on plane surfaces