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| Patents for Leon J. Barnard | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,410,038 | Oct. 29, 1946 | M.H. Arms, L.J. Barnard | Grinding machines | grinders | |
| 2,449,831 | Sep. 21, 1948 | M.H. Arms, L.J. Barnard | Chuck | grinders | |
| 3,167,064 | Jan. 26, 1965 | L.J. Barnard | Grinding wheel truing mechanism | grinder dressers | |