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