All Patents in class 173/20


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All Patents in class 173/20
Patents 1 - 3 of 3
Number	Date	Patentee	Title	Type
643,083	Feb. 06, 1900	M.C. Bullock, deceased (Estate of), M.A. Bullock, Executrix	Thrust Register for Drilling Machines	drill press accessories
921,736	May 18, 1909	J. Pryke, J. Tweedale	Pantograph Engraving Machine	metal engraving machines
RE12,990	Jul. 13, 1909	J. Pryke, J.T. Rawsthorne	Pantograph Engraving Machine	metal engraving machines