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| Patents for Wm. Trewin | |||||
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| Number | Date | Patentee | Title | Type | |
| 55,183 | May 29, 1866 | J. Wilson, C.D. Walters | Lamp Lighter's Torch | auxiliary wrenches | |
| 55,477 | Jun. 12, 1866 | L.S. Enos | Portable Door-Fastening | gimlets | |
| 57,588 | Aug. 28, 1866 | P. Soper | Improvement in Calipers | calipers | |
| 59,131 | Oct. 23, 1866 | J.C. Longshore | Lid-Lifter | combination tools | |
| 71,178 | Nov. 19, 1867 | M.G. Imbach | Improvement in Calipers and Dividers | calipers | |