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| Patents for Richard C. Nugent | |||||
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| Picture | Number | Date | Patentee | Title | |
| 166,716 | Aug. 17, 1875 | R.C. Nugent | Screw Cutting Dies | ||
| 214,181 | Apr. 08, 1879 | R.C. Nugent | Machine for Flanging Metal-Plates | ||
| 242,838 | Jun. 14, 1881 | R.C. Nugent | Machine for Bending Sheet Metal Articles | ||
| 265,535 | Oct. 03, 1882 | R.C. Nugent | Boring Head for Boring Cylinders | ||
| 330,999 | Nov. 24, 1885 | R.C. Nugent | Screw Tap | ||
| 460,883 | Oct. 06, 1891 | R.C. Nugent | Centering Device | ||
 | 484,813 | Oct. 25, 1892 | R.C. Nugent | Inside Calipers | |