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| Patents for Perkins Machine & Gear Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| CA-276,291 | Dec. 13, 1927 | J.L. Perkins, H.D. Croft | Broaching machine | broaching machines | |
| CA-342,009 | May 29, 1934 | H.D. Croft, J.L. Perkins | Gear construction | industrial machine gearing | |
| CA-366,681 | Jun. 08, 1937 | H.D. Croft, L.E. Deloghia, J.L. Perkins | Dough slicing apparatus | baker | |