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| Patents for H. H. Warren | |||||
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| Picture | Number | Date | Patentee | Title | |
| CA-7,714 | Aug. 09, 1877 | J. Abell | Dsposition aux Machines a Battre | ||
| CA-7,718 | Aug. 09, 1877 | J. Abell | Perfectionnements aux Moissonneuses | ||
 | CA-16,702 | Apr. 17, 1883 | J.C. McLachlan | Improvements on harvesting machines | |