| Patents for Samuel Darling |
Patents 16 -
30
of 53
      |
| Number | Date | Patentee | Title | Type |
| 105,180 | Jul. 12, 1870 | S. Darling | Process & Apparatus for Hardening Files | files |
| RE4,197 | Dec. 13, 1870 | S. Darling | Improvment in Inkstands | draftsman |
| 110,959 | Jan. 17, 1871 | S. Darling | Pen Cleaner | draftsman |
| 111,435 | Jan. 31, 1871 | S. Darling | Improvment in Inkstands | draftsman |
| 116,276 | Jun. 27, 1871 | S. Darling | Pencil Sharpener | draftsman |
| 156,840 | Nov. 17, 1874 | S. Darling | Inkstands | draftsman |
| RE6,443 | May 25, 1875 | S. Darling | Improvment in Inkstands | draftsman |
| 164,721 | Jun. 22, 1875 | S. Darling | inkstand | draftsman |
| RE6,574 | Aug. 03, 1875 | S. Darling | Improvment in Inkstands | draftsman |
| RE7,127 | May 23, 1876 | S. Darling | Improvment in Inkstands | draftsman |
| 226,162 | Apr. 06, 1880 | S. Darling | Compensating Errors in Screw Dividing Engines | indexers and dividers |
| 227,962 | May 25, 1880 | S. Darling | Dividing Engine | |
| 230,619 | Aug. 03, 1880 | S. Darling | Graduated Measuring Rule | rules |
| 233,488 | Oct. 19, 1880 | S. Darling | Art of Manufacturing Mathematical Instruments | |
| 235,133 | Dec. 07, 1880 | S. Darling | Micrometer Gage for Wire & Sheet Metal | micrometers |
