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| Patents for Plumb, Burdict and Barnard | |||||
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| Number | Date | Patentee | Title | Type | |
| 211,826 | Jan. 28, 1879 | S.L. Worsley | Machine for Nutting Bolts | nut or bolt making machines | |
| 232,869 | Oct. 05, 1880 | S.L. Worsley | Machine for Threading Screws | metal threading machines | |
| 246,933 | Sep. 13, 1881 | S.L. Worsley | Machine for Feeding Screw Blanks | metal threading machines | |