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| Patents for John R. Heard | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 152,332 | Jun. 23, 1874 | D.H. Chamberlain | Improvement in oilers | |
 | CA-4,908 | Jun. 28, 1875 | A. Beaudry | Perfectionnements aux Herminettes et aux Haches | |
 | 165,725 | Jul. 20, 1875 | L. Glynn | Improvement in Pipe-Tongs | |
 | 169,516 | Nov. 02, 1875 | A.H. Brainard | Improvement in vises | |