| Patents for Samuel Darling |
Patents 31 -
45
of 53
      |
| Number | Date | Patentee | Title | Type |
| 241,879 | May 24, 1881 | E.L. Parsons | Gear Wheel Cutter | milling machine cutters |
| 252,436 | Jan. 17, 1882 | S. Darling | Metallic Try Square | try squares |
| 253,266 | Feb. 07, 1882 | S. Darling | Screw Nut | nut or bolt making machines |
| 253,850 | Feb. 21, 1882 | S. Darling | Gas Heating Apparatus | gas and gasoline engines |
| 287,420 | Oct. 30, 1883 | S. Darling | Micrometer | micrometers |
| 289,512 | Dec. 04, 1883 | S. Darling | Graduated Measure of Length | rule graduations |
| 289,513 | Dec. 04, 1883 | S. Darling | Micrometer Gage | micrometers |
| 292,415 | Jan. 22, 1884 | S. Darling | Comparator | comparators |
| 366,206 | Jul. 12, 1887 | S. Darling | Inkstand | draftsman |
| 366,651 | Jul. 19, 1887 | S. Darling | Bevel & Protractor | protractors |
| 366,652 | Jul. 19, 1887 | S. Darling | Try Square | try squares |
| 369,101 | Aug. 30, 1887 | S. Darling | Inkstand | draftsman |
| 370,379 | Sep. 27, 1887 | S. Darling | Pen Cleaner | draftsman |
| 370,380 | Sep. 27, 1887 | S. Darling | Pen Cleaner Sponge Cup | draftsman |
| 371,740 | Oct. 18, 1887 | S. Darling | Center Square | bevel squares |
