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| Patents for H. J. Crocker | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 89,825 | May 04, 1869 | J.M. Albertson | Improvement in horse-powers | |
 | 97,471 | Dec. 07, 1869 | J.M. Albertson | Improvement in baling-presses | |
 | 103,821 | Jun. 07, 1870 | J.M. Albertson | Improvement in the construction of horse-power for cotton-gins, &c. | |