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| Patents for W. C. Hard | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 41,396 | Jan. 26, 1864 | J. Richards | Improvement in in Trying-Squares | |
 | 65,183 | May 28, 1867 | J. Richards, W.H. Doane | Improvement in shaft-coupling | |
 | 67,676 | Aug. 13, 1867 | J. Richards | Lathe head-stock | |
 | 69,954 | Oct. 15, 1867 | J. Richards | Standard Gauges | |