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| Patents for N. G. Richards | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 89,825 | May 04, 1869 | J.M. Albertson | Improvement in horse-powers | |
 | 119,731 | Oct. 10, 1871 | J.M. Albertson | Improvement in combined cotton-presses and horse-powers | |
 | 139,849 | Jun. 17, 1873 | J.M. Albertson | Improvement in baling-presses | |