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Patents for R. M. Hartley | |||||
Number | Date | Patentee | Title | Type | |
59,950 | Nov. 27, 1866 | J. Borthwick | Improved Machine for Sharpening Saws | annular saws | |
D16,803 | Jul. 20, 1886 | M. Bacon | Design for a frame for telegraph-instruments | telegraphy apparatus |